xref: /linux/drivers/scsi/myrb.c (revision a1d1eb2f57501b2e7e2076ce89b3f3a666ddbfdd)
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * Linux Driver for Mylex DAC960/AcceleRAID/eXtremeRAID PCI RAID Controllers
4  *
5  * Copyright 2017 Hannes Reinecke, SUSE Linux GmbH <hare@suse.com>
6  *
7  * Based on the original DAC960 driver,
8  * Copyright 1998-2001 by Leonard N. Zubkoff <lnz@dandelion.com>
9  * Portions Copyright 2002 by Mylex (An IBM Business Unit)
10  *
11  */
12 
13 #include <linux/module.h>
14 #include <linux/types.h>
15 #include <linux/delay.h>
16 #include <linux/interrupt.h>
17 #include <linux/pci.h>
18 #include <linux/raid_class.h>
19 #include <asm/unaligned.h>
20 #include <scsi/scsi.h>
21 #include <scsi/scsi_host.h>
22 #include <scsi/scsi_device.h>
23 #include <scsi/scsi_cmnd.h>
24 #include <scsi/scsi_tcq.h>
25 #include "myrb.h"
26 
27 static struct raid_template *myrb_raid_template;
28 
29 static void myrb_monitor(struct work_struct *work);
30 static inline void myrb_translate_devstate(void *DeviceState);
31 
32 static inline int myrb_logical_channel(struct Scsi_Host *shost)
33 {
34 	return shost->max_channel - 1;
35 }
36 
37 static struct myrb_devstate_name_entry {
38 	enum myrb_devstate state;
39 	const char *name;
40 } myrb_devstate_name_list[] = {
41 	{ MYRB_DEVICE_DEAD, "Dead" },
42 	{ MYRB_DEVICE_WO, "WriteOnly" },
43 	{ MYRB_DEVICE_ONLINE, "Online" },
44 	{ MYRB_DEVICE_CRITICAL, "Critical" },
45 	{ MYRB_DEVICE_STANDBY, "Standby" },
46 	{ MYRB_DEVICE_OFFLINE, "Offline" },
47 };
48 
49 static const char *myrb_devstate_name(enum myrb_devstate state)
50 {
51 	struct myrb_devstate_name_entry *entry = myrb_devstate_name_list;
52 	int i;
53 
54 	for (i = 0; i < ARRAY_SIZE(myrb_devstate_name_list); i++) {
55 		if (entry[i].state == state)
56 			return entry[i].name;
57 	}
58 	return "Unknown";
59 }
60 
61 static struct myrb_raidlevel_name_entry {
62 	enum myrb_raidlevel level;
63 	const char *name;
64 } myrb_raidlevel_name_list[] = {
65 	{ MYRB_RAID_LEVEL0, "RAID0" },
66 	{ MYRB_RAID_LEVEL1, "RAID1" },
67 	{ MYRB_RAID_LEVEL3, "RAID3" },
68 	{ MYRB_RAID_LEVEL5, "RAID5" },
69 	{ MYRB_RAID_LEVEL6, "RAID6" },
70 	{ MYRB_RAID_JBOD, "JBOD" },
71 };
72 
73 static const char *myrb_raidlevel_name(enum myrb_raidlevel level)
74 {
75 	struct myrb_raidlevel_name_entry *entry = myrb_raidlevel_name_list;
76 	int i;
77 
78 	for (i = 0; i < ARRAY_SIZE(myrb_raidlevel_name_list); i++) {
79 		if (entry[i].level == level)
80 			return entry[i].name;
81 	}
82 	return NULL;
83 }
84 
85 /*
86  * myrb_create_mempools - allocates auxiliary data structures
87  *
88  * Return: true on success, false otherwise.
89  */
90 static bool myrb_create_mempools(struct pci_dev *pdev, struct myrb_hba *cb)
91 {
92 	size_t elem_size, elem_align;
93 
94 	elem_align = sizeof(struct myrb_sge);
95 	elem_size = cb->host->sg_tablesize * elem_align;
96 	cb->sg_pool = dma_pool_create("myrb_sg", &pdev->dev,
97 				      elem_size, elem_align, 0);
98 	if (cb->sg_pool == NULL) {
99 		shost_printk(KERN_ERR, cb->host,
100 			     "Failed to allocate SG pool\n");
101 		return false;
102 	}
103 
104 	cb->dcdb_pool = dma_pool_create("myrb_dcdb", &pdev->dev,
105 				       sizeof(struct myrb_dcdb),
106 				       sizeof(unsigned int), 0);
107 	if (!cb->dcdb_pool) {
108 		dma_pool_destroy(cb->sg_pool);
109 		cb->sg_pool = NULL;
110 		shost_printk(KERN_ERR, cb->host,
111 			     "Failed to allocate DCDB pool\n");
112 		return false;
113 	}
114 
115 	cb->work_q = alloc_ordered_workqueue("myrb_wq_%d", WQ_MEM_RECLAIM,
116 					     cb->host->host_no);
117 	if (!cb->work_q) {
118 		dma_pool_destroy(cb->dcdb_pool);
119 		cb->dcdb_pool = NULL;
120 		dma_pool_destroy(cb->sg_pool);
121 		cb->sg_pool = NULL;
122 		shost_printk(KERN_ERR, cb->host,
123 			     "Failed to create workqueue\n");
124 		return false;
125 	}
126 
127 	/*
128 	 * Initialize the Monitoring Timer.
129 	 */
130 	INIT_DELAYED_WORK(&cb->monitor_work, myrb_monitor);
131 	queue_delayed_work(cb->work_q, &cb->monitor_work, 1);
132 
133 	return true;
134 }
135 
136 /*
137  * myrb_destroy_mempools - tears down the memory pools for the controller
138  */
139 static void myrb_destroy_mempools(struct myrb_hba *cb)
140 {
141 	cancel_delayed_work_sync(&cb->monitor_work);
142 	destroy_workqueue(cb->work_q);
143 
144 	dma_pool_destroy(cb->sg_pool);
145 	dma_pool_destroy(cb->dcdb_pool);
146 }
147 
148 /*
149  * myrb_reset_cmd - reset command block
150  */
151 static inline void myrb_reset_cmd(struct myrb_cmdblk *cmd_blk)
152 {
153 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
154 
155 	memset(mbox, 0, sizeof(union myrb_cmd_mbox));
156 	cmd_blk->status = 0;
157 }
158 
159 /*
160  * myrb_qcmd - queues command block for execution
161  */
162 static void myrb_qcmd(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk)
163 {
164 	void __iomem *base = cb->io_base;
165 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
166 	union myrb_cmd_mbox *next_mbox = cb->next_cmd_mbox;
167 
168 	cb->write_cmd_mbox(next_mbox, mbox);
169 	if (cb->prev_cmd_mbox1->words[0] == 0 ||
170 	    cb->prev_cmd_mbox2->words[0] == 0)
171 		cb->get_cmd_mbox(base);
172 	cb->prev_cmd_mbox2 = cb->prev_cmd_mbox1;
173 	cb->prev_cmd_mbox1 = next_mbox;
174 	if (++next_mbox > cb->last_cmd_mbox)
175 		next_mbox = cb->first_cmd_mbox;
176 	cb->next_cmd_mbox = next_mbox;
177 }
178 
179 /*
180  * myrb_exec_cmd - executes command block and waits for completion.
181  *
182  * Return: command status
183  */
184 static unsigned short myrb_exec_cmd(struct myrb_hba *cb,
185 		struct myrb_cmdblk *cmd_blk)
186 {
187 	DECLARE_COMPLETION_ONSTACK(cmpl);
188 	unsigned long flags;
189 
190 	cmd_blk->completion = &cmpl;
191 
192 	spin_lock_irqsave(&cb->queue_lock, flags);
193 	cb->qcmd(cb, cmd_blk);
194 	spin_unlock_irqrestore(&cb->queue_lock, flags);
195 
196 	wait_for_completion(&cmpl);
197 	return cmd_blk->status;
198 }
199 
200 /*
201  * myrb_exec_type3 - executes a type 3 command and waits for completion.
202  *
203  * Return: command status
204  */
205 static unsigned short myrb_exec_type3(struct myrb_hba *cb,
206 		enum myrb_cmd_opcode op, dma_addr_t addr)
207 {
208 	struct myrb_cmdblk *cmd_blk = &cb->dcmd_blk;
209 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
210 	unsigned short status;
211 
212 	mutex_lock(&cb->dcmd_mutex);
213 	myrb_reset_cmd(cmd_blk);
214 	mbox->type3.id = MYRB_DCMD_TAG;
215 	mbox->type3.opcode = op;
216 	mbox->type3.addr = addr;
217 	status = myrb_exec_cmd(cb, cmd_blk);
218 	mutex_unlock(&cb->dcmd_mutex);
219 	return status;
220 }
221 
222 /*
223  * myrb_exec_type3D - executes a type 3D command and waits for completion.
224  *
225  * Return: command status
226  */
227 static unsigned short myrb_exec_type3D(struct myrb_hba *cb,
228 		enum myrb_cmd_opcode op, struct scsi_device *sdev,
229 		struct myrb_pdev_state *pdev_info)
230 {
231 	struct myrb_cmdblk *cmd_blk = &cb->dcmd_blk;
232 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
233 	unsigned short status;
234 	dma_addr_t pdev_info_addr;
235 
236 	pdev_info_addr = dma_map_single(&cb->pdev->dev, pdev_info,
237 					sizeof(struct myrb_pdev_state),
238 					DMA_FROM_DEVICE);
239 	if (dma_mapping_error(&cb->pdev->dev, pdev_info_addr))
240 		return MYRB_STATUS_SUBSYS_FAILED;
241 
242 	mutex_lock(&cb->dcmd_mutex);
243 	myrb_reset_cmd(cmd_blk);
244 	mbox->type3D.id = MYRB_DCMD_TAG;
245 	mbox->type3D.opcode = op;
246 	mbox->type3D.channel = sdev->channel;
247 	mbox->type3D.target = sdev->id;
248 	mbox->type3D.addr = pdev_info_addr;
249 	status = myrb_exec_cmd(cb, cmd_blk);
250 	mutex_unlock(&cb->dcmd_mutex);
251 	dma_unmap_single(&cb->pdev->dev, pdev_info_addr,
252 			 sizeof(struct myrb_pdev_state), DMA_FROM_DEVICE);
253 	if (status == MYRB_STATUS_SUCCESS &&
254 	    mbox->type3D.opcode == MYRB_CMD_GET_DEVICE_STATE_OLD)
255 		myrb_translate_devstate(pdev_info);
256 
257 	return status;
258 }
259 
260 static char *myrb_event_msg[] = {
261 	"killed because write recovery failed",
262 	"killed because of SCSI bus reset failure",
263 	"killed because of double check condition",
264 	"killed because it was removed",
265 	"killed because of gross error on SCSI chip",
266 	"killed because of bad tag returned from drive",
267 	"killed because of timeout on SCSI command",
268 	"killed because of reset SCSI command issued from system",
269 	"killed because busy or parity error count exceeded limit",
270 	"killed because of 'kill drive' command from system",
271 	"killed because of selection timeout",
272 	"killed due to SCSI phase sequence error",
273 	"killed due to unknown status",
274 };
275 
276 /**
277  * myrb_get_event - get event log from HBA
278  * @cb: pointer to the hba structure
279  * @event: number of the event
280  *
281  * Execute a type 3E command and logs the event message
282  */
283 static void myrb_get_event(struct myrb_hba *cb, unsigned int event)
284 {
285 	struct myrb_cmdblk *cmd_blk = &cb->mcmd_blk;
286 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
287 	struct myrb_log_entry *ev_buf;
288 	dma_addr_t ev_addr;
289 	unsigned short status;
290 
291 	ev_buf = dma_alloc_coherent(&cb->pdev->dev,
292 				    sizeof(struct myrb_log_entry),
293 				    &ev_addr, GFP_KERNEL);
294 	if (!ev_buf)
295 		return;
296 
297 	myrb_reset_cmd(cmd_blk);
298 	mbox->type3E.id = MYRB_MCMD_TAG;
299 	mbox->type3E.opcode = MYRB_CMD_EVENT_LOG_OPERATION;
300 	mbox->type3E.optype = DAC960_V1_GetEventLogEntry;
301 	mbox->type3E.opqual = 1;
302 	mbox->type3E.ev_seq = event;
303 	mbox->type3E.addr = ev_addr;
304 	status = myrb_exec_cmd(cb, cmd_blk);
305 	if (status != MYRB_STATUS_SUCCESS)
306 		shost_printk(KERN_INFO, cb->host,
307 			     "Failed to get event log %d, status %04x\n",
308 			     event, status);
309 
310 	else if (ev_buf->seq_num == event) {
311 		struct scsi_sense_hdr sshdr;
312 
313 		memset(&sshdr, 0, sizeof(sshdr));
314 		scsi_normalize_sense(ev_buf->sense, 32, &sshdr);
315 
316 		if (sshdr.sense_key == VENDOR_SPECIFIC &&
317 		    sshdr.asc == 0x80 &&
318 		    sshdr.ascq < ARRAY_SIZE(myrb_event_msg))
319 			shost_printk(KERN_CRIT, cb->host,
320 				     "Physical drive %d:%d: %s\n",
321 				     ev_buf->channel, ev_buf->target,
322 				     myrb_event_msg[sshdr.ascq]);
323 		else
324 			shost_printk(KERN_CRIT, cb->host,
325 				     "Physical drive %d:%d: Sense: %X/%02X/%02X\n",
326 				     ev_buf->channel, ev_buf->target,
327 				     sshdr.sense_key, sshdr.asc, sshdr.ascq);
328 	}
329 
330 	dma_free_coherent(&cb->pdev->dev, sizeof(struct myrb_log_entry),
331 			  ev_buf, ev_addr);
332 }
333 
334 /*
335  * myrb_get_errtable - retrieves the error table from the controller
336  *
337  * Executes a type 3 command and logs the error table from the controller.
338  */
339 static void myrb_get_errtable(struct myrb_hba *cb)
340 {
341 	struct myrb_cmdblk *cmd_blk = &cb->mcmd_blk;
342 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
343 	unsigned short status;
344 	struct myrb_error_entry old_table[MYRB_MAX_CHANNELS * MYRB_MAX_TARGETS];
345 
346 	memcpy(&old_table, cb->err_table, sizeof(old_table));
347 
348 	myrb_reset_cmd(cmd_blk);
349 	mbox->type3.id = MYRB_MCMD_TAG;
350 	mbox->type3.opcode = MYRB_CMD_GET_ERROR_TABLE;
351 	mbox->type3.addr = cb->err_table_addr;
352 	status = myrb_exec_cmd(cb, cmd_blk);
353 	if (status == MYRB_STATUS_SUCCESS) {
354 		struct myrb_error_entry *table = cb->err_table;
355 		struct myrb_error_entry *new, *old;
356 		size_t err_table_offset;
357 		struct scsi_device *sdev;
358 
359 		shost_for_each_device(sdev, cb->host) {
360 			if (sdev->channel >= myrb_logical_channel(cb->host))
361 				continue;
362 			err_table_offset = sdev->channel * MYRB_MAX_TARGETS
363 				+ sdev->id;
364 			new = table + err_table_offset;
365 			old = &old_table[err_table_offset];
366 			if (new->parity_err == old->parity_err &&
367 			    new->soft_err == old->soft_err &&
368 			    new->hard_err == old->hard_err &&
369 			    new->misc_err == old->misc_err)
370 				continue;
371 			sdev_printk(KERN_CRIT, sdev,
372 				    "Errors: Parity = %d, Soft = %d, Hard = %d, Misc = %d\n",
373 				    new->parity_err, new->soft_err,
374 				    new->hard_err, new->misc_err);
375 		}
376 	}
377 }
378 
379 /*
380  * myrb_get_ldev_info - retrieves the logical device table from the controller
381  *
382  * Executes a type 3 command and updates the logical device table.
383  *
384  * Return: command status
385  */
386 static unsigned short myrb_get_ldev_info(struct myrb_hba *cb)
387 {
388 	unsigned short status;
389 	int ldev_num, ldev_cnt = cb->enquiry->ldev_count;
390 	struct Scsi_Host *shost = cb->host;
391 
392 	status = myrb_exec_type3(cb, MYRB_CMD_GET_LDEV_INFO,
393 				 cb->ldev_info_addr);
394 	if (status != MYRB_STATUS_SUCCESS)
395 		return status;
396 
397 	for (ldev_num = 0; ldev_num < ldev_cnt; ldev_num++) {
398 		struct myrb_ldev_info *old = NULL;
399 		struct myrb_ldev_info *new = cb->ldev_info_buf + ldev_num;
400 		struct scsi_device *sdev;
401 
402 		sdev = scsi_device_lookup(shost, myrb_logical_channel(shost),
403 					  ldev_num, 0);
404 		if (!sdev) {
405 			if (new->state == MYRB_DEVICE_OFFLINE)
406 				continue;
407 			shost_printk(KERN_INFO, shost,
408 				     "Adding Logical Drive %d in state %s\n",
409 				     ldev_num, myrb_devstate_name(new->state));
410 			scsi_add_device(shost, myrb_logical_channel(shost),
411 					ldev_num, 0);
412 			continue;
413 		}
414 		old = sdev->hostdata;
415 		if (new->state != old->state)
416 			shost_printk(KERN_INFO, shost,
417 				     "Logical Drive %d is now %s\n",
418 				     ldev_num, myrb_devstate_name(new->state));
419 		if (new->wb_enabled != old->wb_enabled)
420 			sdev_printk(KERN_INFO, sdev,
421 				    "Logical Drive is now WRITE %s\n",
422 				    (new->wb_enabled ? "BACK" : "THRU"));
423 		memcpy(old, new, sizeof(*new));
424 		scsi_device_put(sdev);
425 	}
426 	return status;
427 }
428 
429 /*
430  * myrb_get_rbld_progress - get rebuild progress information
431  *
432  * Executes a type 3 command and returns the rebuild progress
433  * information.
434  *
435  * Return: command status
436  */
437 static unsigned short myrb_get_rbld_progress(struct myrb_hba *cb,
438 		struct myrb_rbld_progress *rbld)
439 {
440 	struct myrb_cmdblk *cmd_blk = &cb->mcmd_blk;
441 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
442 	struct myrb_rbld_progress *rbld_buf;
443 	dma_addr_t rbld_addr;
444 	unsigned short status;
445 
446 	rbld_buf = dma_alloc_coherent(&cb->pdev->dev,
447 				      sizeof(struct myrb_rbld_progress),
448 				      &rbld_addr, GFP_KERNEL);
449 	if (!rbld_buf)
450 		return MYRB_STATUS_RBLD_NOT_CHECKED;
451 
452 	myrb_reset_cmd(cmd_blk);
453 	mbox->type3.id = MYRB_MCMD_TAG;
454 	mbox->type3.opcode = MYRB_CMD_GET_REBUILD_PROGRESS;
455 	mbox->type3.addr = rbld_addr;
456 	status = myrb_exec_cmd(cb, cmd_blk);
457 	if (rbld)
458 		memcpy(rbld, rbld_buf, sizeof(struct myrb_rbld_progress));
459 	dma_free_coherent(&cb->pdev->dev, sizeof(struct myrb_rbld_progress),
460 			  rbld_buf, rbld_addr);
461 	return status;
462 }
463 
464 /*
465  * myrb_update_rbld_progress - updates the rebuild status
466  *
467  * Updates the rebuild status for the attached logical devices.
468  */
469 static void myrb_update_rbld_progress(struct myrb_hba *cb)
470 {
471 	struct myrb_rbld_progress rbld_buf;
472 	unsigned short status;
473 
474 	status = myrb_get_rbld_progress(cb, &rbld_buf);
475 	if (status == MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS &&
476 	    cb->last_rbld_status == MYRB_STATUS_SUCCESS)
477 		status = MYRB_STATUS_RBLD_SUCCESS;
478 	if (status != MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS) {
479 		unsigned int blocks_done =
480 			rbld_buf.ldev_size - rbld_buf.blocks_left;
481 		struct scsi_device *sdev;
482 
483 		sdev = scsi_device_lookup(cb->host,
484 					  myrb_logical_channel(cb->host),
485 					  rbld_buf.ldev_num, 0);
486 		if (!sdev)
487 			return;
488 
489 		switch (status) {
490 		case MYRB_STATUS_SUCCESS:
491 			sdev_printk(KERN_INFO, sdev,
492 				    "Rebuild in Progress, %d%% completed\n",
493 				    (100 * (blocks_done >> 7))
494 				    / (rbld_buf.ldev_size >> 7));
495 			break;
496 		case MYRB_STATUS_RBLD_FAILED_LDEV_FAILURE:
497 			sdev_printk(KERN_INFO, sdev,
498 				    "Rebuild Failed due to Logical Drive Failure\n");
499 			break;
500 		case MYRB_STATUS_RBLD_FAILED_BADBLOCKS:
501 			sdev_printk(KERN_INFO, sdev,
502 				    "Rebuild Failed due to Bad Blocks on Other Drives\n");
503 			break;
504 		case MYRB_STATUS_RBLD_FAILED_NEW_DRIVE_FAILED:
505 			sdev_printk(KERN_INFO, sdev,
506 				    "Rebuild Failed due to Failure of Drive Being Rebuilt\n");
507 			break;
508 		case MYRB_STATUS_RBLD_SUCCESS:
509 			sdev_printk(KERN_INFO, sdev,
510 				    "Rebuild Completed Successfully\n");
511 			break;
512 		case MYRB_STATUS_RBLD_SUCCESS_TERMINATED:
513 			sdev_printk(KERN_INFO, sdev,
514 				     "Rebuild Successfully Terminated\n");
515 			break;
516 		default:
517 			break;
518 		}
519 		scsi_device_put(sdev);
520 	}
521 	cb->last_rbld_status = status;
522 }
523 
524 /*
525  * myrb_get_cc_progress - retrieve the rebuild status
526  *
527  * Execute a type 3 Command and fetch the rebuild / consistency check
528  * status.
529  */
530 static void myrb_get_cc_progress(struct myrb_hba *cb)
531 {
532 	struct myrb_cmdblk *cmd_blk = &cb->mcmd_blk;
533 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
534 	struct myrb_rbld_progress *rbld_buf;
535 	dma_addr_t rbld_addr;
536 	unsigned short status;
537 
538 	rbld_buf = dma_alloc_coherent(&cb->pdev->dev,
539 				      sizeof(struct myrb_rbld_progress),
540 				      &rbld_addr, GFP_KERNEL);
541 	if (!rbld_buf) {
542 		cb->need_cc_status = true;
543 		return;
544 	}
545 	myrb_reset_cmd(cmd_blk);
546 	mbox->type3.id = MYRB_MCMD_TAG;
547 	mbox->type3.opcode = MYRB_CMD_REBUILD_STAT;
548 	mbox->type3.addr = rbld_addr;
549 	status = myrb_exec_cmd(cb, cmd_blk);
550 	if (status == MYRB_STATUS_SUCCESS) {
551 		unsigned int ldev_num = rbld_buf->ldev_num;
552 		unsigned int ldev_size = rbld_buf->ldev_size;
553 		unsigned int blocks_done =
554 			ldev_size - rbld_buf->blocks_left;
555 		struct scsi_device *sdev;
556 
557 		sdev = scsi_device_lookup(cb->host,
558 					  myrb_logical_channel(cb->host),
559 					  ldev_num, 0);
560 		if (sdev) {
561 			sdev_printk(KERN_INFO, sdev,
562 				    "Consistency Check in Progress: %d%% completed\n",
563 				    (100 * (blocks_done >> 7))
564 				    / (ldev_size >> 7));
565 			scsi_device_put(sdev);
566 		}
567 	}
568 	dma_free_coherent(&cb->pdev->dev, sizeof(struct myrb_rbld_progress),
569 			  rbld_buf, rbld_addr);
570 }
571 
572 /*
573  * myrb_bgi_control - updates background initialisation status
574  *
575  * Executes a type 3B command and updates the background initialisation status
576  */
577 static void myrb_bgi_control(struct myrb_hba *cb)
578 {
579 	struct myrb_cmdblk *cmd_blk = &cb->mcmd_blk;
580 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
581 	struct myrb_bgi_status *bgi, *last_bgi;
582 	dma_addr_t bgi_addr;
583 	struct scsi_device *sdev = NULL;
584 	unsigned short status;
585 
586 	bgi = dma_alloc_coherent(&cb->pdev->dev, sizeof(struct myrb_bgi_status),
587 				 &bgi_addr, GFP_KERNEL);
588 	if (!bgi) {
589 		shost_printk(KERN_ERR, cb->host,
590 			     "Failed to allocate bgi memory\n");
591 		return;
592 	}
593 	myrb_reset_cmd(cmd_blk);
594 	mbox->type3B.id = MYRB_DCMD_TAG;
595 	mbox->type3B.opcode = MYRB_CMD_BGI_CONTROL;
596 	mbox->type3B.optype = 0x20;
597 	mbox->type3B.addr = bgi_addr;
598 	status = myrb_exec_cmd(cb, cmd_blk);
599 	last_bgi = &cb->bgi_status;
600 	sdev = scsi_device_lookup(cb->host,
601 				  myrb_logical_channel(cb->host),
602 				  bgi->ldev_num, 0);
603 	switch (status) {
604 	case MYRB_STATUS_SUCCESS:
605 		switch (bgi->status) {
606 		case MYRB_BGI_INVALID:
607 			break;
608 		case MYRB_BGI_STARTED:
609 			if (!sdev)
610 				break;
611 			sdev_printk(KERN_INFO, sdev,
612 				    "Background Initialization Started\n");
613 			break;
614 		case MYRB_BGI_INPROGRESS:
615 			if (!sdev)
616 				break;
617 			if (bgi->blocks_done == last_bgi->blocks_done &&
618 			    bgi->ldev_num == last_bgi->ldev_num)
619 				break;
620 			sdev_printk(KERN_INFO, sdev,
621 				 "Background Initialization in Progress: %d%% completed\n",
622 				 (100 * (bgi->blocks_done >> 7))
623 				 / (bgi->ldev_size >> 7));
624 			break;
625 		case MYRB_BGI_SUSPENDED:
626 			if (!sdev)
627 				break;
628 			sdev_printk(KERN_INFO, sdev,
629 				    "Background Initialization Suspended\n");
630 			break;
631 		case MYRB_BGI_CANCELLED:
632 			if (!sdev)
633 				break;
634 			sdev_printk(KERN_INFO, sdev,
635 				    "Background Initialization Cancelled\n");
636 			break;
637 		}
638 		memcpy(&cb->bgi_status, bgi, sizeof(struct myrb_bgi_status));
639 		break;
640 	case MYRB_STATUS_BGI_SUCCESS:
641 		if (sdev && cb->bgi_status.status == MYRB_BGI_INPROGRESS)
642 			sdev_printk(KERN_INFO, sdev,
643 				    "Background Initialization Completed Successfully\n");
644 		cb->bgi_status.status = MYRB_BGI_INVALID;
645 		break;
646 	case MYRB_STATUS_BGI_ABORTED:
647 		if (sdev && cb->bgi_status.status == MYRB_BGI_INPROGRESS)
648 			sdev_printk(KERN_INFO, sdev,
649 				    "Background Initialization Aborted\n");
650 		fallthrough;
651 	case MYRB_STATUS_NO_BGI_INPROGRESS:
652 		cb->bgi_status.status = MYRB_BGI_INVALID;
653 		break;
654 	}
655 	if (sdev)
656 		scsi_device_put(sdev);
657 	dma_free_coherent(&cb->pdev->dev, sizeof(struct myrb_bgi_status),
658 			  bgi, bgi_addr);
659 }
660 
661 /*
662  * myrb_hba_enquiry - updates the controller status
663  *
664  * Executes a DAC_V1_Enquiry command and updates the controller status.
665  *
666  * Return: command status
667  */
668 static unsigned short myrb_hba_enquiry(struct myrb_hba *cb)
669 {
670 	struct myrb_enquiry old, *new;
671 	unsigned short status;
672 
673 	memcpy(&old, cb->enquiry, sizeof(struct myrb_enquiry));
674 
675 	status = myrb_exec_type3(cb, MYRB_CMD_ENQUIRY, cb->enquiry_addr);
676 	if (status != MYRB_STATUS_SUCCESS)
677 		return status;
678 
679 	new = cb->enquiry;
680 	if (new->ldev_count > old.ldev_count) {
681 		int ldev_num = old.ldev_count - 1;
682 
683 		while (++ldev_num < new->ldev_count)
684 			shost_printk(KERN_CRIT, cb->host,
685 				     "Logical Drive %d Now Exists\n",
686 				     ldev_num);
687 	}
688 	if (new->ldev_count < old.ldev_count) {
689 		int ldev_num = new->ldev_count - 1;
690 
691 		while (++ldev_num < old.ldev_count)
692 			shost_printk(KERN_CRIT, cb->host,
693 				     "Logical Drive %d No Longer Exists\n",
694 				     ldev_num);
695 	}
696 	if (new->status.deferred != old.status.deferred)
697 		shost_printk(KERN_CRIT, cb->host,
698 			     "Deferred Write Error Flag is now %s\n",
699 			     (new->status.deferred ? "TRUE" : "FALSE"));
700 	if (new->ev_seq != old.ev_seq) {
701 		cb->new_ev_seq = new->ev_seq;
702 		cb->need_err_info = true;
703 		shost_printk(KERN_INFO, cb->host,
704 			     "Event log %d/%d (%d/%d) available\n",
705 			     cb->old_ev_seq, cb->new_ev_seq,
706 			     old.ev_seq, new->ev_seq);
707 	}
708 	if ((new->ldev_critical > 0 &&
709 	     new->ldev_critical != old.ldev_critical) ||
710 	    (new->ldev_offline > 0 &&
711 	     new->ldev_offline != old.ldev_offline) ||
712 	    (new->ldev_count != old.ldev_count)) {
713 		shost_printk(KERN_INFO, cb->host,
714 			     "Logical drive count changed (%d/%d/%d)\n",
715 			     new->ldev_critical,
716 			     new->ldev_offline,
717 			     new->ldev_count);
718 		cb->need_ldev_info = true;
719 	}
720 	if (new->pdev_dead > 0 ||
721 	    new->pdev_dead != old.pdev_dead ||
722 	    time_after_eq(jiffies, cb->secondary_monitor_time
723 			  + MYRB_SECONDARY_MONITOR_INTERVAL)) {
724 		cb->need_bgi_status = cb->bgi_status_supported;
725 		cb->secondary_monitor_time = jiffies;
726 	}
727 	if (new->rbld == MYRB_STDBY_RBLD_IN_PROGRESS ||
728 	    new->rbld == MYRB_BG_RBLD_IN_PROGRESS ||
729 	    old.rbld == MYRB_STDBY_RBLD_IN_PROGRESS ||
730 	    old.rbld == MYRB_BG_RBLD_IN_PROGRESS) {
731 		cb->need_rbld = true;
732 		cb->rbld_first = (new->ldev_critical < old.ldev_critical);
733 	}
734 	if (old.rbld == MYRB_BG_CHECK_IN_PROGRESS)
735 		switch (new->rbld) {
736 		case MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS:
737 			shost_printk(KERN_INFO, cb->host,
738 				     "Consistency Check Completed Successfully\n");
739 			break;
740 		case MYRB_STDBY_RBLD_IN_PROGRESS:
741 		case MYRB_BG_RBLD_IN_PROGRESS:
742 			break;
743 		case MYRB_BG_CHECK_IN_PROGRESS:
744 			cb->need_cc_status = true;
745 			break;
746 		case MYRB_STDBY_RBLD_COMPLETED_WITH_ERROR:
747 			shost_printk(KERN_INFO, cb->host,
748 				     "Consistency Check Completed with Error\n");
749 			break;
750 		case MYRB_BG_RBLD_OR_CHECK_FAILED_DRIVE_FAILED:
751 			shost_printk(KERN_INFO, cb->host,
752 				     "Consistency Check Failed - Physical Device Failed\n");
753 			break;
754 		case MYRB_BG_RBLD_OR_CHECK_FAILED_LDEV_FAILED:
755 			shost_printk(KERN_INFO, cb->host,
756 				     "Consistency Check Failed - Logical Drive Failed\n");
757 			break;
758 		case MYRB_BG_RBLD_OR_CHECK_FAILED_OTHER:
759 			shost_printk(KERN_INFO, cb->host,
760 				     "Consistency Check Failed - Other Causes\n");
761 			break;
762 		case MYRB_BG_RBLD_OR_CHECK_SUCCESS_TERMINATED:
763 			shost_printk(KERN_INFO, cb->host,
764 				     "Consistency Check Successfully Terminated\n");
765 			break;
766 		}
767 	else if (new->rbld == MYRB_BG_CHECK_IN_PROGRESS)
768 		cb->need_cc_status = true;
769 
770 	return MYRB_STATUS_SUCCESS;
771 }
772 
773 /*
774  * myrb_set_pdev_state - sets the device state for a physical device
775  *
776  * Return: command status
777  */
778 static unsigned short myrb_set_pdev_state(struct myrb_hba *cb,
779 		struct scsi_device *sdev, enum myrb_devstate state)
780 {
781 	struct myrb_cmdblk *cmd_blk = &cb->dcmd_blk;
782 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
783 	unsigned short status;
784 
785 	mutex_lock(&cb->dcmd_mutex);
786 	mbox->type3D.opcode = MYRB_CMD_START_DEVICE;
787 	mbox->type3D.id = MYRB_DCMD_TAG;
788 	mbox->type3D.channel = sdev->channel;
789 	mbox->type3D.target = sdev->id;
790 	mbox->type3D.state = state & 0x1F;
791 	status = myrb_exec_cmd(cb, cmd_blk);
792 	mutex_unlock(&cb->dcmd_mutex);
793 
794 	return status;
795 }
796 
797 /*
798  * myrb_enable_mmio - enables the Memory Mailbox Interface
799  *
800  * PD and P controller types have no memory mailbox, but still need the
801  * other dma mapped memory.
802  *
803  * Return: true on success, false otherwise.
804  */
805 static bool myrb_enable_mmio(struct myrb_hba *cb, mbox_mmio_init_t mmio_init_fn)
806 {
807 	void __iomem *base = cb->io_base;
808 	struct pci_dev *pdev = cb->pdev;
809 	size_t err_table_size;
810 	size_t ldev_info_size;
811 	union myrb_cmd_mbox *cmd_mbox_mem;
812 	struct myrb_stat_mbox *stat_mbox_mem;
813 	union myrb_cmd_mbox mbox;
814 	unsigned short status;
815 
816 	memset(&mbox, 0, sizeof(union myrb_cmd_mbox));
817 
818 	if (dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
819 		dev_err(&pdev->dev, "DMA mask out of range\n");
820 		return false;
821 	}
822 
823 	cb->enquiry = dma_alloc_coherent(&pdev->dev,
824 					 sizeof(struct myrb_enquiry),
825 					 &cb->enquiry_addr, GFP_KERNEL);
826 	if (!cb->enquiry)
827 		return false;
828 
829 	err_table_size = sizeof(struct myrb_error_entry) *
830 		MYRB_MAX_CHANNELS * MYRB_MAX_TARGETS;
831 	cb->err_table = dma_alloc_coherent(&pdev->dev, err_table_size,
832 					   &cb->err_table_addr, GFP_KERNEL);
833 	if (!cb->err_table)
834 		return false;
835 
836 	ldev_info_size = sizeof(struct myrb_ldev_info) * MYRB_MAX_LDEVS;
837 	cb->ldev_info_buf = dma_alloc_coherent(&pdev->dev, ldev_info_size,
838 					       &cb->ldev_info_addr, GFP_KERNEL);
839 	if (!cb->ldev_info_buf)
840 		return false;
841 
842 	/*
843 	 * Skip mailbox initialisation for PD and P Controllers
844 	 */
845 	if (!mmio_init_fn)
846 		return true;
847 
848 	/* These are the base addresses for the command memory mailbox array */
849 	cb->cmd_mbox_size =  MYRB_CMD_MBOX_COUNT * sizeof(union myrb_cmd_mbox);
850 	cb->first_cmd_mbox = dma_alloc_coherent(&pdev->dev,
851 						cb->cmd_mbox_size,
852 						&cb->cmd_mbox_addr,
853 						GFP_KERNEL);
854 	if (!cb->first_cmd_mbox)
855 		return false;
856 
857 	cmd_mbox_mem = cb->first_cmd_mbox;
858 	cmd_mbox_mem += MYRB_CMD_MBOX_COUNT - 1;
859 	cb->last_cmd_mbox = cmd_mbox_mem;
860 	cb->next_cmd_mbox = cb->first_cmd_mbox;
861 	cb->prev_cmd_mbox1 = cb->last_cmd_mbox;
862 	cb->prev_cmd_mbox2 = cb->last_cmd_mbox - 1;
863 
864 	/* These are the base addresses for the status memory mailbox array */
865 	cb->stat_mbox_size = MYRB_STAT_MBOX_COUNT *
866 	    sizeof(struct myrb_stat_mbox);
867 	cb->first_stat_mbox = dma_alloc_coherent(&pdev->dev,
868 						 cb->stat_mbox_size,
869 						 &cb->stat_mbox_addr,
870 						 GFP_KERNEL);
871 	if (!cb->first_stat_mbox)
872 		return false;
873 
874 	stat_mbox_mem = cb->first_stat_mbox;
875 	stat_mbox_mem += MYRB_STAT_MBOX_COUNT - 1;
876 	cb->last_stat_mbox = stat_mbox_mem;
877 	cb->next_stat_mbox = cb->first_stat_mbox;
878 
879 	/* Enable the Memory Mailbox Interface. */
880 	cb->dual_mode_interface = true;
881 	mbox.typeX.opcode = 0x2B;
882 	mbox.typeX.id = 0;
883 	mbox.typeX.opcode2 = 0x14;
884 	mbox.typeX.cmd_mbox_addr = cb->cmd_mbox_addr;
885 	mbox.typeX.stat_mbox_addr = cb->stat_mbox_addr;
886 
887 	status = mmio_init_fn(pdev, base, &mbox);
888 	if (status != MYRB_STATUS_SUCCESS) {
889 		cb->dual_mode_interface = false;
890 		mbox.typeX.opcode2 = 0x10;
891 		status = mmio_init_fn(pdev, base, &mbox);
892 		if (status != MYRB_STATUS_SUCCESS) {
893 			dev_err(&pdev->dev,
894 				"Failed to enable mailbox, statux %02X\n",
895 				status);
896 			return false;
897 		}
898 	}
899 	return true;
900 }
901 
902 /*
903  * myrb_get_hba_config - reads the configuration information
904  *
905  * Reads the configuration information from the controller and
906  * initializes the controller structure.
907  *
908  * Return: 0 on success, errno otherwise
909  */
910 static int myrb_get_hba_config(struct myrb_hba *cb)
911 {
912 	struct myrb_enquiry2 *enquiry2;
913 	dma_addr_t enquiry2_addr;
914 	struct myrb_config2 *config2;
915 	dma_addr_t config2_addr;
916 	struct Scsi_Host *shost = cb->host;
917 	struct pci_dev *pdev = cb->pdev;
918 	int pchan_max = 0, pchan_cur = 0;
919 	unsigned short status;
920 	int ret = -ENODEV, memsize = 0;
921 
922 	enquiry2 = dma_alloc_coherent(&pdev->dev, sizeof(struct myrb_enquiry2),
923 				      &enquiry2_addr, GFP_KERNEL);
924 	if (!enquiry2) {
925 		shost_printk(KERN_ERR, cb->host,
926 			     "Failed to allocate V1 enquiry2 memory\n");
927 		return -ENOMEM;
928 	}
929 	config2 = dma_alloc_coherent(&pdev->dev, sizeof(struct myrb_config2),
930 				     &config2_addr, GFP_KERNEL);
931 	if (!config2) {
932 		shost_printk(KERN_ERR, cb->host,
933 			     "Failed to allocate V1 config2 memory\n");
934 		dma_free_coherent(&pdev->dev, sizeof(struct myrb_enquiry2),
935 				  enquiry2, enquiry2_addr);
936 		return -ENOMEM;
937 	}
938 	mutex_lock(&cb->dma_mutex);
939 	status = myrb_hba_enquiry(cb);
940 	mutex_unlock(&cb->dma_mutex);
941 	if (status != MYRB_STATUS_SUCCESS) {
942 		shost_printk(KERN_WARNING, cb->host,
943 			     "Failed it issue V1 Enquiry\n");
944 		goto out_free;
945 	}
946 
947 	status = myrb_exec_type3(cb, MYRB_CMD_ENQUIRY2, enquiry2_addr);
948 	if (status != MYRB_STATUS_SUCCESS) {
949 		shost_printk(KERN_WARNING, cb->host,
950 			     "Failed to issue V1 Enquiry2\n");
951 		goto out_free;
952 	}
953 
954 	status = myrb_exec_type3(cb, MYRB_CMD_READ_CONFIG2, config2_addr);
955 	if (status != MYRB_STATUS_SUCCESS) {
956 		shost_printk(KERN_WARNING, cb->host,
957 			     "Failed to issue ReadConfig2\n");
958 		goto out_free;
959 	}
960 
961 	status = myrb_get_ldev_info(cb);
962 	if (status != MYRB_STATUS_SUCCESS) {
963 		shost_printk(KERN_WARNING, cb->host,
964 			     "Failed to get logical drive information\n");
965 		goto out_free;
966 	}
967 
968 	/*
969 	 * Initialize the Controller Model Name and Full Model Name fields.
970 	 */
971 	switch (enquiry2->hw.sub_model) {
972 	case DAC960_V1_P_PD_PU:
973 		if (enquiry2->scsi_cap.bus_speed == MYRB_SCSI_SPEED_ULTRA)
974 			strcpy(cb->model_name, "DAC960PU");
975 		else
976 			strcpy(cb->model_name, "DAC960PD");
977 		break;
978 	case DAC960_V1_PL:
979 		strcpy(cb->model_name, "DAC960PL");
980 		break;
981 	case DAC960_V1_PG:
982 		strcpy(cb->model_name, "DAC960PG");
983 		break;
984 	case DAC960_V1_PJ:
985 		strcpy(cb->model_name, "DAC960PJ");
986 		break;
987 	case DAC960_V1_PR:
988 		strcpy(cb->model_name, "DAC960PR");
989 		break;
990 	case DAC960_V1_PT:
991 		strcpy(cb->model_name, "DAC960PT");
992 		break;
993 	case DAC960_V1_PTL0:
994 		strcpy(cb->model_name, "DAC960PTL0");
995 		break;
996 	case DAC960_V1_PRL:
997 		strcpy(cb->model_name, "DAC960PRL");
998 		break;
999 	case DAC960_V1_PTL1:
1000 		strcpy(cb->model_name, "DAC960PTL1");
1001 		break;
1002 	case DAC960_V1_1164P:
1003 		strcpy(cb->model_name, "eXtremeRAID 1100");
1004 		break;
1005 	default:
1006 		shost_printk(KERN_WARNING, cb->host,
1007 			     "Unknown Model %X\n",
1008 			     enquiry2->hw.sub_model);
1009 		goto out;
1010 	}
1011 	/*
1012 	 * Initialize the Controller Firmware Version field and verify that it
1013 	 * is a supported firmware version.
1014 	 * The supported firmware versions are:
1015 	 *
1016 	 * DAC1164P		    5.06 and above
1017 	 * DAC960PTL/PRL/PJ/PG	    4.06 and above
1018 	 * DAC960PU/PD/PL	    3.51 and above
1019 	 * DAC960PU/PD/PL/P	    2.73 and above
1020 	 */
1021 #if defined(CONFIG_ALPHA)
1022 	/*
1023 	 * DEC Alpha machines were often equipped with DAC960 cards that were
1024 	 * OEMed from Mylex, and had their own custom firmware. Version 2.70,
1025 	 * the last custom FW revision to be released by DEC for these older
1026 	 * controllers, appears to work quite well with this driver.
1027 	 *
1028 	 * Cards tested successfully were several versions each of the PD and
1029 	 * PU, called by DEC the KZPSC and KZPAC, respectively, and having
1030 	 * the Manufacturer Numbers (from Mylex), usually on a sticker on the
1031 	 * back of the board, of:
1032 	 *
1033 	 * KZPSC:  D040347 (1-channel) or D040348 (2-channel)
1034 	 *         or D040349 (3-channel)
1035 	 * KZPAC:  D040395 (1-channel) or D040396 (2-channel)
1036 	 *         or D040397 (3-channel)
1037 	 */
1038 # define FIRMWARE_27X	"2.70"
1039 #else
1040 # define FIRMWARE_27X	"2.73"
1041 #endif
1042 
1043 	if (enquiry2->fw.major_version == 0) {
1044 		enquiry2->fw.major_version = cb->enquiry->fw_major_version;
1045 		enquiry2->fw.minor_version = cb->enquiry->fw_minor_version;
1046 		enquiry2->fw.firmware_type = '0';
1047 		enquiry2->fw.turn_id = 0;
1048 	}
1049 	snprintf(cb->fw_version, sizeof(cb->fw_version),
1050 		"%u.%02u-%c-%02u",
1051 		enquiry2->fw.major_version,
1052 		enquiry2->fw.minor_version,
1053 		enquiry2->fw.firmware_type,
1054 		enquiry2->fw.turn_id);
1055 	if (!((enquiry2->fw.major_version == 5 &&
1056 	       enquiry2->fw.minor_version >= 6) ||
1057 	      (enquiry2->fw.major_version == 4 &&
1058 	       enquiry2->fw.minor_version >= 6) ||
1059 	      (enquiry2->fw.major_version == 3 &&
1060 	       enquiry2->fw.minor_version >= 51) ||
1061 	      (enquiry2->fw.major_version == 2 &&
1062 	       strcmp(cb->fw_version, FIRMWARE_27X) >= 0))) {
1063 		shost_printk(KERN_WARNING, cb->host,
1064 			"Firmware Version '%s' unsupported\n",
1065 			cb->fw_version);
1066 		goto out;
1067 	}
1068 	/*
1069 	 * Initialize the Channels, Targets, Memory Size, and SAF-TE
1070 	 * Enclosure Management Enabled fields.
1071 	 */
1072 	switch (enquiry2->hw.model) {
1073 	case MYRB_5_CHANNEL_BOARD:
1074 		pchan_max = 5;
1075 		break;
1076 	case MYRB_3_CHANNEL_BOARD:
1077 	case MYRB_3_CHANNEL_ASIC_DAC:
1078 		pchan_max = 3;
1079 		break;
1080 	case MYRB_2_CHANNEL_BOARD:
1081 		pchan_max = 2;
1082 		break;
1083 	default:
1084 		pchan_max = enquiry2->cfg_chan;
1085 		break;
1086 	}
1087 	pchan_cur = enquiry2->cur_chan;
1088 	if (enquiry2->scsi_cap.bus_width == MYRB_WIDTH_WIDE_32BIT)
1089 		cb->bus_width = 32;
1090 	else if (enquiry2->scsi_cap.bus_width == MYRB_WIDTH_WIDE_16BIT)
1091 		cb->bus_width = 16;
1092 	else
1093 		cb->bus_width = 8;
1094 	cb->ldev_block_size = enquiry2->ldev_block_size;
1095 	shost->max_channel = pchan_cur;
1096 	shost->max_id = enquiry2->max_targets;
1097 	memsize = enquiry2->mem_size >> 20;
1098 	cb->safte_enabled = (enquiry2->fault_mgmt == MYRB_FAULT_SAFTE);
1099 	/*
1100 	 * Initialize the Controller Queue Depth, Driver Queue Depth,
1101 	 * Logical Drive Count, Maximum Blocks per Command, Controller
1102 	 * Scatter/Gather Limit, and Driver Scatter/Gather Limit.
1103 	 * The Driver Queue Depth must be at most one less than the
1104 	 * Controller Queue Depth to allow for an automatic drive
1105 	 * rebuild operation.
1106 	 */
1107 	shost->can_queue = cb->enquiry->max_tcq;
1108 	if (shost->can_queue < 3)
1109 		shost->can_queue = enquiry2->max_cmds;
1110 	if (shost->can_queue < 3)
1111 		/* Play safe and disable TCQ */
1112 		shost->can_queue = 1;
1113 
1114 	if (shost->can_queue > MYRB_CMD_MBOX_COUNT - 2)
1115 		shost->can_queue = MYRB_CMD_MBOX_COUNT - 2;
1116 	shost->max_sectors = enquiry2->max_sectors;
1117 	shost->sg_tablesize = enquiry2->max_sge;
1118 	if (shost->sg_tablesize > MYRB_SCATTER_GATHER_LIMIT)
1119 		shost->sg_tablesize = MYRB_SCATTER_GATHER_LIMIT;
1120 	/*
1121 	 * Initialize the Stripe Size, Segment Size, and Geometry Translation.
1122 	 */
1123 	cb->stripe_size = config2->blocks_per_stripe * config2->block_factor
1124 		>> (10 - MYRB_BLKSIZE_BITS);
1125 	cb->segment_size = config2->blocks_per_cacheline * config2->block_factor
1126 		>> (10 - MYRB_BLKSIZE_BITS);
1127 	/* Assume 255/63 translation */
1128 	cb->ldev_geom_heads = 255;
1129 	cb->ldev_geom_sectors = 63;
1130 	if (config2->drive_geometry) {
1131 		cb->ldev_geom_heads = 128;
1132 		cb->ldev_geom_sectors = 32;
1133 	}
1134 
1135 	/*
1136 	 * Initialize the Background Initialization Status.
1137 	 */
1138 	if ((cb->fw_version[0] == '4' &&
1139 	     strcmp(cb->fw_version, "4.08") >= 0) ||
1140 	    (cb->fw_version[0] == '5' &&
1141 	     strcmp(cb->fw_version, "5.08") >= 0)) {
1142 		cb->bgi_status_supported = true;
1143 		myrb_bgi_control(cb);
1144 	}
1145 	cb->last_rbld_status = MYRB_NO_STDBY_RBLD_OR_CHECK_IN_PROGRESS;
1146 	ret = 0;
1147 
1148 out:
1149 	shost_printk(KERN_INFO, cb->host,
1150 		"Configuring %s PCI RAID Controller\n", cb->model_name);
1151 	shost_printk(KERN_INFO, cb->host,
1152 		"  Firmware Version: %s, Memory Size: %dMB\n",
1153 		cb->fw_version, memsize);
1154 	if (cb->io_addr == 0)
1155 		shost_printk(KERN_INFO, cb->host,
1156 			"  I/O Address: n/a, PCI Address: 0x%lX, IRQ Channel: %d\n",
1157 			(unsigned long)cb->pci_addr, cb->irq);
1158 	else
1159 		shost_printk(KERN_INFO, cb->host,
1160 			"  I/O Address: 0x%lX, PCI Address: 0x%lX, IRQ Channel: %d\n",
1161 			(unsigned long)cb->io_addr, (unsigned long)cb->pci_addr,
1162 			cb->irq);
1163 	shost_printk(KERN_INFO, cb->host,
1164 		"  Controller Queue Depth: %d, Maximum Blocks per Command: %d\n",
1165 		cb->host->can_queue, cb->host->max_sectors);
1166 	shost_printk(KERN_INFO, cb->host,
1167 		     "  Driver Queue Depth: %d, Scatter/Gather Limit: %d of %d Segments\n",
1168 		     cb->host->can_queue, cb->host->sg_tablesize,
1169 		     MYRB_SCATTER_GATHER_LIMIT);
1170 	shost_printk(KERN_INFO, cb->host,
1171 		     "  Stripe Size: %dKB, Segment Size: %dKB, BIOS Geometry: %d/%d%s\n",
1172 		     cb->stripe_size, cb->segment_size,
1173 		     cb->ldev_geom_heads, cb->ldev_geom_sectors,
1174 		     cb->safte_enabled ?
1175 		     "  SAF-TE Enclosure Management Enabled" : "");
1176 	shost_printk(KERN_INFO, cb->host,
1177 		     "  Physical: %d/%d channels %d/%d/%d devices\n",
1178 		     pchan_cur, pchan_max, 0, cb->enquiry->pdev_dead,
1179 		     cb->host->max_id);
1180 
1181 	shost_printk(KERN_INFO, cb->host,
1182 		     "  Logical: 1/1 channels, %d/%d disks\n",
1183 		     cb->enquiry->ldev_count, MYRB_MAX_LDEVS);
1184 
1185 out_free:
1186 	dma_free_coherent(&pdev->dev, sizeof(struct myrb_enquiry2),
1187 			  enquiry2, enquiry2_addr);
1188 	dma_free_coherent(&pdev->dev, sizeof(struct myrb_config2),
1189 			  config2, config2_addr);
1190 
1191 	return ret;
1192 }
1193 
1194 /*
1195  * myrb_unmap - unmaps controller structures
1196  */
1197 static void myrb_unmap(struct myrb_hba *cb)
1198 {
1199 	if (cb->ldev_info_buf) {
1200 		size_t ldev_info_size = sizeof(struct myrb_ldev_info) *
1201 			MYRB_MAX_LDEVS;
1202 		dma_free_coherent(&cb->pdev->dev, ldev_info_size,
1203 				  cb->ldev_info_buf, cb->ldev_info_addr);
1204 		cb->ldev_info_buf = NULL;
1205 	}
1206 	if (cb->err_table) {
1207 		size_t err_table_size = sizeof(struct myrb_error_entry) *
1208 			MYRB_MAX_CHANNELS * MYRB_MAX_TARGETS;
1209 		dma_free_coherent(&cb->pdev->dev, err_table_size,
1210 				  cb->err_table, cb->err_table_addr);
1211 		cb->err_table = NULL;
1212 	}
1213 	if (cb->enquiry) {
1214 		dma_free_coherent(&cb->pdev->dev, sizeof(struct myrb_enquiry),
1215 				  cb->enquiry, cb->enquiry_addr);
1216 		cb->enquiry = NULL;
1217 	}
1218 	if (cb->first_stat_mbox) {
1219 		dma_free_coherent(&cb->pdev->dev, cb->stat_mbox_size,
1220 				  cb->first_stat_mbox, cb->stat_mbox_addr);
1221 		cb->first_stat_mbox = NULL;
1222 	}
1223 	if (cb->first_cmd_mbox) {
1224 		dma_free_coherent(&cb->pdev->dev, cb->cmd_mbox_size,
1225 				  cb->first_cmd_mbox, cb->cmd_mbox_addr);
1226 		cb->first_cmd_mbox = NULL;
1227 	}
1228 }
1229 
1230 /*
1231  * myrb_cleanup - cleanup controller structures
1232  */
1233 static void myrb_cleanup(struct myrb_hba *cb)
1234 {
1235 	struct pci_dev *pdev = cb->pdev;
1236 
1237 	/* Free the memory mailbox, status, and related structures */
1238 	myrb_unmap(cb);
1239 
1240 	if (cb->mmio_base) {
1241 		if (cb->disable_intr)
1242 			cb->disable_intr(cb->io_base);
1243 		iounmap(cb->mmio_base);
1244 	}
1245 	if (cb->irq)
1246 		free_irq(cb->irq, cb);
1247 	if (cb->io_addr)
1248 		release_region(cb->io_addr, 0x80);
1249 	pci_set_drvdata(pdev, NULL);
1250 	pci_disable_device(pdev);
1251 	scsi_host_put(cb->host);
1252 }
1253 
1254 static int myrb_host_reset(struct scsi_cmnd *scmd)
1255 {
1256 	struct Scsi_Host *shost = scmd->device->host;
1257 	struct myrb_hba *cb = shost_priv(shost);
1258 
1259 	cb->reset(cb->io_base);
1260 	return SUCCESS;
1261 }
1262 
1263 static int myrb_pthru_queuecommand(struct Scsi_Host *shost,
1264 		struct scsi_cmnd *scmd)
1265 {
1266 	struct request *rq = scsi_cmd_to_rq(scmd);
1267 	struct myrb_hba *cb = shost_priv(shost);
1268 	struct myrb_cmdblk *cmd_blk = scsi_cmd_priv(scmd);
1269 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
1270 	struct myrb_dcdb *dcdb;
1271 	dma_addr_t dcdb_addr;
1272 	struct scsi_device *sdev = scmd->device;
1273 	struct scatterlist *sgl;
1274 	unsigned long flags;
1275 	int nsge;
1276 
1277 	myrb_reset_cmd(cmd_blk);
1278 	dcdb = dma_pool_alloc(cb->dcdb_pool, GFP_ATOMIC, &dcdb_addr);
1279 	if (!dcdb)
1280 		return SCSI_MLQUEUE_HOST_BUSY;
1281 	nsge = scsi_dma_map(scmd);
1282 	if (nsge > 1) {
1283 		dma_pool_free(cb->dcdb_pool, dcdb, dcdb_addr);
1284 		scmd->result = (DID_ERROR << 16);
1285 		scsi_done(scmd);
1286 		return 0;
1287 	}
1288 
1289 	mbox->type3.opcode = MYRB_CMD_DCDB;
1290 	mbox->type3.id = rq->tag + 3;
1291 	mbox->type3.addr = dcdb_addr;
1292 	dcdb->channel = sdev->channel;
1293 	dcdb->target = sdev->id;
1294 	switch (scmd->sc_data_direction) {
1295 	case DMA_NONE:
1296 		dcdb->data_xfer = MYRB_DCDB_XFER_NONE;
1297 		break;
1298 	case DMA_TO_DEVICE:
1299 		dcdb->data_xfer = MYRB_DCDB_XFER_SYSTEM_TO_DEVICE;
1300 		break;
1301 	case DMA_FROM_DEVICE:
1302 		dcdb->data_xfer = MYRB_DCDB_XFER_DEVICE_TO_SYSTEM;
1303 		break;
1304 	default:
1305 		dcdb->data_xfer = MYRB_DCDB_XFER_ILLEGAL;
1306 		break;
1307 	}
1308 	dcdb->early_status = false;
1309 	if (rq->timeout <= 10)
1310 		dcdb->timeout = MYRB_DCDB_TMO_10_SECS;
1311 	else if (rq->timeout <= 60)
1312 		dcdb->timeout = MYRB_DCDB_TMO_60_SECS;
1313 	else if (rq->timeout <= 600)
1314 		dcdb->timeout = MYRB_DCDB_TMO_10_MINS;
1315 	else
1316 		dcdb->timeout = MYRB_DCDB_TMO_24_HRS;
1317 	dcdb->no_autosense = false;
1318 	dcdb->allow_disconnect = true;
1319 	sgl = scsi_sglist(scmd);
1320 	dcdb->dma_addr = sg_dma_address(sgl);
1321 	if (sg_dma_len(sgl) > USHRT_MAX) {
1322 		dcdb->xfer_len_lo = sg_dma_len(sgl) & 0xffff;
1323 		dcdb->xfer_len_hi4 = sg_dma_len(sgl) >> 16;
1324 	} else {
1325 		dcdb->xfer_len_lo = sg_dma_len(sgl);
1326 		dcdb->xfer_len_hi4 = 0;
1327 	}
1328 	dcdb->cdb_len = scmd->cmd_len;
1329 	dcdb->sense_len = sizeof(dcdb->sense);
1330 	memcpy(&dcdb->cdb, scmd->cmnd, scmd->cmd_len);
1331 
1332 	spin_lock_irqsave(&cb->queue_lock, flags);
1333 	cb->qcmd(cb, cmd_blk);
1334 	spin_unlock_irqrestore(&cb->queue_lock, flags);
1335 	return 0;
1336 }
1337 
1338 static void myrb_inquiry(struct myrb_hba *cb,
1339 		struct scsi_cmnd *scmd)
1340 {
1341 	unsigned char inq[36] = {
1342 		0x00, 0x00, 0x03, 0x02, 0x20, 0x00, 0x01, 0x00,
1343 		0x4d, 0x59, 0x4c, 0x45, 0x58, 0x20, 0x20, 0x20,
1344 		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
1345 		0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20, 0x20,
1346 		0x20, 0x20, 0x20, 0x20,
1347 	};
1348 
1349 	if (cb->bus_width > 16)
1350 		inq[7] |= 1 << 6;
1351 	if (cb->bus_width > 8)
1352 		inq[7] |= 1 << 5;
1353 	memcpy(&inq[16], cb->model_name, 16);
1354 	memcpy(&inq[32], cb->fw_version, 1);
1355 	memcpy(&inq[33], &cb->fw_version[2], 2);
1356 	memcpy(&inq[35], &cb->fw_version[7], 1);
1357 
1358 	scsi_sg_copy_from_buffer(scmd, (void *)inq, 36);
1359 }
1360 
1361 static void
1362 myrb_mode_sense(struct myrb_hba *cb, struct scsi_cmnd *scmd,
1363 		struct myrb_ldev_info *ldev_info)
1364 {
1365 	unsigned char modes[32], *mode_pg;
1366 	bool dbd;
1367 	size_t mode_len;
1368 
1369 	dbd = (scmd->cmnd[1] & 0x08) == 0x08;
1370 	if (dbd) {
1371 		mode_len = 24;
1372 		mode_pg = &modes[4];
1373 	} else {
1374 		mode_len = 32;
1375 		mode_pg = &modes[12];
1376 	}
1377 	memset(modes, 0, sizeof(modes));
1378 	modes[0] = mode_len - 1;
1379 	if (!dbd) {
1380 		unsigned char *block_desc = &modes[4];
1381 
1382 		modes[3] = 8;
1383 		put_unaligned_be32(ldev_info->size, &block_desc[0]);
1384 		put_unaligned_be32(cb->ldev_block_size, &block_desc[5]);
1385 	}
1386 	mode_pg[0] = 0x08;
1387 	mode_pg[1] = 0x12;
1388 	if (ldev_info->wb_enabled)
1389 		mode_pg[2] |= 0x04;
1390 	if (cb->segment_size) {
1391 		mode_pg[2] |= 0x08;
1392 		put_unaligned_be16(cb->segment_size, &mode_pg[14]);
1393 	}
1394 
1395 	scsi_sg_copy_from_buffer(scmd, modes, mode_len);
1396 }
1397 
1398 static void myrb_request_sense(struct myrb_hba *cb,
1399 		struct scsi_cmnd *scmd)
1400 {
1401 	scsi_build_sense(scmd, 0, NO_SENSE, 0, 0);
1402 	scsi_sg_copy_from_buffer(scmd, scmd->sense_buffer,
1403 				 SCSI_SENSE_BUFFERSIZE);
1404 }
1405 
1406 static void myrb_read_capacity(struct myrb_hba *cb, struct scsi_cmnd *scmd,
1407 		struct myrb_ldev_info *ldev_info)
1408 {
1409 	unsigned char data[8];
1410 
1411 	dev_dbg(&scmd->device->sdev_gendev,
1412 		"Capacity %u, blocksize %u\n",
1413 		ldev_info->size, cb->ldev_block_size);
1414 	put_unaligned_be32(ldev_info->size - 1, &data[0]);
1415 	put_unaligned_be32(cb->ldev_block_size, &data[4]);
1416 	scsi_sg_copy_from_buffer(scmd, data, 8);
1417 }
1418 
1419 static int myrb_ldev_queuecommand(struct Scsi_Host *shost,
1420 		struct scsi_cmnd *scmd)
1421 {
1422 	struct myrb_hba *cb = shost_priv(shost);
1423 	struct myrb_cmdblk *cmd_blk = scsi_cmd_priv(scmd);
1424 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
1425 	struct myrb_ldev_info *ldev_info;
1426 	struct scsi_device *sdev = scmd->device;
1427 	struct scatterlist *sgl;
1428 	unsigned long flags;
1429 	u64 lba;
1430 	u32 block_cnt;
1431 	int nsge;
1432 
1433 	ldev_info = sdev->hostdata;
1434 	if (ldev_info->state != MYRB_DEVICE_ONLINE &&
1435 	    ldev_info->state != MYRB_DEVICE_WO) {
1436 		dev_dbg(&shost->shost_gendev, "ldev %u in state %x, skip\n",
1437 			sdev->id, ldev_info ? ldev_info->state : 0xff);
1438 		scmd->result = (DID_BAD_TARGET << 16);
1439 		scsi_done(scmd);
1440 		return 0;
1441 	}
1442 	switch (scmd->cmnd[0]) {
1443 	case TEST_UNIT_READY:
1444 		scmd->result = (DID_OK << 16);
1445 		scsi_done(scmd);
1446 		return 0;
1447 	case INQUIRY:
1448 		if (scmd->cmnd[1] & 1) {
1449 			/* Illegal request, invalid field in CDB */
1450 			scsi_build_sense(scmd, 0, ILLEGAL_REQUEST, 0x24, 0);
1451 		} else {
1452 			myrb_inquiry(cb, scmd);
1453 			scmd->result = (DID_OK << 16);
1454 		}
1455 		scsi_done(scmd);
1456 		return 0;
1457 	case SYNCHRONIZE_CACHE:
1458 		scmd->result = (DID_OK << 16);
1459 		scsi_done(scmd);
1460 		return 0;
1461 	case MODE_SENSE:
1462 		if ((scmd->cmnd[2] & 0x3F) != 0x3F &&
1463 		    (scmd->cmnd[2] & 0x3F) != 0x08) {
1464 			/* Illegal request, invalid field in CDB */
1465 			scsi_build_sense(scmd, 0, ILLEGAL_REQUEST, 0x24, 0);
1466 		} else {
1467 			myrb_mode_sense(cb, scmd, ldev_info);
1468 			scmd->result = (DID_OK << 16);
1469 		}
1470 		scsi_done(scmd);
1471 		return 0;
1472 	case READ_CAPACITY:
1473 		if ((scmd->cmnd[1] & 1) ||
1474 		    (scmd->cmnd[8] & 1)) {
1475 			/* Illegal request, invalid field in CDB */
1476 			scsi_build_sense(scmd, 0, ILLEGAL_REQUEST, 0x24, 0);
1477 			scsi_done(scmd);
1478 			return 0;
1479 		}
1480 		lba = get_unaligned_be32(&scmd->cmnd[2]);
1481 		if (lba) {
1482 			/* Illegal request, invalid field in CDB */
1483 			scsi_build_sense(scmd, 0, ILLEGAL_REQUEST, 0x24, 0);
1484 			scsi_done(scmd);
1485 			return 0;
1486 		}
1487 		myrb_read_capacity(cb, scmd, ldev_info);
1488 		scsi_done(scmd);
1489 		return 0;
1490 	case REQUEST_SENSE:
1491 		myrb_request_sense(cb, scmd);
1492 		scmd->result = (DID_OK << 16);
1493 		return 0;
1494 	case SEND_DIAGNOSTIC:
1495 		if (scmd->cmnd[1] != 0x04) {
1496 			/* Illegal request, invalid field in CDB */
1497 			scsi_build_sense(scmd, 0, ILLEGAL_REQUEST, 0x24, 0);
1498 		} else {
1499 			/* Assume good status */
1500 			scmd->result = (DID_OK << 16);
1501 		}
1502 		scsi_done(scmd);
1503 		return 0;
1504 	case READ_6:
1505 		if (ldev_info->state == MYRB_DEVICE_WO) {
1506 			/* Data protect, attempt to read invalid data */
1507 			scsi_build_sense(scmd, 0, DATA_PROTECT, 0x21, 0x06);
1508 			scsi_done(scmd);
1509 			return 0;
1510 		}
1511 		fallthrough;
1512 	case WRITE_6:
1513 		lba = (((scmd->cmnd[1] & 0x1F) << 16) |
1514 		       (scmd->cmnd[2] << 8) |
1515 		       scmd->cmnd[3]);
1516 		block_cnt = scmd->cmnd[4];
1517 		break;
1518 	case READ_10:
1519 		if (ldev_info->state == MYRB_DEVICE_WO) {
1520 			/* Data protect, attempt to read invalid data */
1521 			scsi_build_sense(scmd, 0, DATA_PROTECT, 0x21, 0x06);
1522 			scsi_done(scmd);
1523 			return 0;
1524 		}
1525 		fallthrough;
1526 	case WRITE_10:
1527 	case VERIFY:		/* 0x2F */
1528 	case WRITE_VERIFY:	/* 0x2E */
1529 		lba = get_unaligned_be32(&scmd->cmnd[2]);
1530 		block_cnt = get_unaligned_be16(&scmd->cmnd[7]);
1531 		break;
1532 	case READ_12:
1533 		if (ldev_info->state == MYRB_DEVICE_WO) {
1534 			/* Data protect, attempt to read invalid data */
1535 			scsi_build_sense(scmd, 0, DATA_PROTECT, 0x21, 0x06);
1536 			scsi_done(scmd);
1537 			return 0;
1538 		}
1539 		fallthrough;
1540 	case WRITE_12:
1541 	case VERIFY_12: /* 0xAF */
1542 	case WRITE_VERIFY_12:	/* 0xAE */
1543 		lba = get_unaligned_be32(&scmd->cmnd[2]);
1544 		block_cnt = get_unaligned_be32(&scmd->cmnd[6]);
1545 		break;
1546 	default:
1547 		/* Illegal request, invalid opcode */
1548 		scsi_build_sense(scmd, 0, ILLEGAL_REQUEST, 0x20, 0);
1549 		scsi_done(scmd);
1550 		return 0;
1551 	}
1552 
1553 	myrb_reset_cmd(cmd_blk);
1554 	mbox->type5.id = scsi_cmd_to_rq(scmd)->tag + 3;
1555 	if (scmd->sc_data_direction == DMA_NONE)
1556 		goto submit;
1557 	nsge = scsi_dma_map(scmd);
1558 	if (nsge == 1) {
1559 		sgl = scsi_sglist(scmd);
1560 		if (scmd->sc_data_direction == DMA_FROM_DEVICE)
1561 			mbox->type5.opcode = MYRB_CMD_READ;
1562 		else
1563 			mbox->type5.opcode = MYRB_CMD_WRITE;
1564 
1565 		mbox->type5.ld.xfer_len = block_cnt;
1566 		mbox->type5.ld.ldev_num = sdev->id;
1567 		mbox->type5.lba = lba;
1568 		mbox->type5.addr = (u32)sg_dma_address(sgl);
1569 	} else {
1570 		struct myrb_sge *hw_sgl;
1571 		dma_addr_t hw_sgl_addr;
1572 		int i;
1573 
1574 		hw_sgl = dma_pool_alloc(cb->sg_pool, GFP_ATOMIC, &hw_sgl_addr);
1575 		if (!hw_sgl)
1576 			return SCSI_MLQUEUE_HOST_BUSY;
1577 
1578 		cmd_blk->sgl = hw_sgl;
1579 		cmd_blk->sgl_addr = hw_sgl_addr;
1580 
1581 		if (scmd->sc_data_direction == DMA_FROM_DEVICE)
1582 			mbox->type5.opcode = MYRB_CMD_READ_SG;
1583 		else
1584 			mbox->type5.opcode = MYRB_CMD_WRITE_SG;
1585 
1586 		mbox->type5.ld.xfer_len = block_cnt;
1587 		mbox->type5.ld.ldev_num = sdev->id;
1588 		mbox->type5.lba = lba;
1589 		mbox->type5.addr = hw_sgl_addr;
1590 		mbox->type5.sg_count = nsge;
1591 
1592 		scsi_for_each_sg(scmd, sgl, nsge, i) {
1593 			hw_sgl->sge_addr = (u32)sg_dma_address(sgl);
1594 			hw_sgl->sge_count = (u32)sg_dma_len(sgl);
1595 			hw_sgl++;
1596 		}
1597 	}
1598 submit:
1599 	spin_lock_irqsave(&cb->queue_lock, flags);
1600 	cb->qcmd(cb, cmd_blk);
1601 	spin_unlock_irqrestore(&cb->queue_lock, flags);
1602 
1603 	return 0;
1604 }
1605 
1606 static int myrb_queuecommand(struct Scsi_Host *shost,
1607 		struct scsi_cmnd *scmd)
1608 {
1609 	struct scsi_device *sdev = scmd->device;
1610 
1611 	if (sdev->channel > myrb_logical_channel(shost)) {
1612 		scmd->result = (DID_BAD_TARGET << 16);
1613 		scsi_done(scmd);
1614 		return 0;
1615 	}
1616 	if (sdev->channel == myrb_logical_channel(shost))
1617 		return myrb_ldev_queuecommand(shost, scmd);
1618 
1619 	return myrb_pthru_queuecommand(shost, scmd);
1620 }
1621 
1622 static int myrb_ldev_slave_alloc(struct scsi_device *sdev)
1623 {
1624 	struct myrb_hba *cb = shost_priv(sdev->host);
1625 	struct myrb_ldev_info *ldev_info;
1626 	unsigned short ldev_num = sdev->id;
1627 	enum raid_level level;
1628 
1629 	ldev_info = cb->ldev_info_buf + ldev_num;
1630 	if (!ldev_info)
1631 		return -ENXIO;
1632 
1633 	sdev->hostdata = kzalloc(sizeof(*ldev_info), GFP_KERNEL);
1634 	if (!sdev->hostdata)
1635 		return -ENOMEM;
1636 	dev_dbg(&sdev->sdev_gendev,
1637 		"slave alloc ldev %d state %x\n",
1638 		ldev_num, ldev_info->state);
1639 	memcpy(sdev->hostdata, ldev_info,
1640 	       sizeof(*ldev_info));
1641 	switch (ldev_info->raid_level) {
1642 	case MYRB_RAID_LEVEL0:
1643 		level = RAID_LEVEL_LINEAR;
1644 		break;
1645 	case MYRB_RAID_LEVEL1:
1646 		level = RAID_LEVEL_1;
1647 		break;
1648 	case MYRB_RAID_LEVEL3:
1649 		level = RAID_LEVEL_3;
1650 		break;
1651 	case MYRB_RAID_LEVEL5:
1652 		level = RAID_LEVEL_5;
1653 		break;
1654 	case MYRB_RAID_LEVEL6:
1655 		level = RAID_LEVEL_6;
1656 		break;
1657 	case MYRB_RAID_JBOD:
1658 		level = RAID_LEVEL_JBOD;
1659 		break;
1660 	default:
1661 		level = RAID_LEVEL_UNKNOWN;
1662 		break;
1663 	}
1664 	raid_set_level(myrb_raid_template, &sdev->sdev_gendev, level);
1665 	return 0;
1666 }
1667 
1668 static int myrb_pdev_slave_alloc(struct scsi_device *sdev)
1669 {
1670 	struct myrb_hba *cb = shost_priv(sdev->host);
1671 	struct myrb_pdev_state *pdev_info;
1672 	unsigned short status;
1673 
1674 	if (sdev->id > MYRB_MAX_TARGETS)
1675 		return -ENXIO;
1676 
1677 	pdev_info = kzalloc(sizeof(*pdev_info), GFP_KERNEL);
1678 	if (!pdev_info)
1679 		return -ENOMEM;
1680 
1681 	status = myrb_exec_type3D(cb, MYRB_CMD_GET_DEVICE_STATE,
1682 				  sdev, pdev_info);
1683 	if (status != MYRB_STATUS_SUCCESS) {
1684 		dev_dbg(&sdev->sdev_gendev,
1685 			"Failed to get device state, status %x\n",
1686 			status);
1687 		kfree(pdev_info);
1688 		return -ENXIO;
1689 	}
1690 	if (!pdev_info->present) {
1691 		dev_dbg(&sdev->sdev_gendev,
1692 			"device not present, skip\n");
1693 		kfree(pdev_info);
1694 		return -ENXIO;
1695 	}
1696 	dev_dbg(&sdev->sdev_gendev,
1697 		"slave alloc pdev %d:%d state %x\n",
1698 		sdev->channel, sdev->id, pdev_info->state);
1699 	sdev->hostdata = pdev_info;
1700 
1701 	return 0;
1702 }
1703 
1704 static int myrb_slave_alloc(struct scsi_device *sdev)
1705 {
1706 	if (sdev->channel > myrb_logical_channel(sdev->host))
1707 		return -ENXIO;
1708 
1709 	if (sdev->lun > 0)
1710 		return -ENXIO;
1711 
1712 	if (sdev->channel == myrb_logical_channel(sdev->host))
1713 		return myrb_ldev_slave_alloc(sdev);
1714 
1715 	return myrb_pdev_slave_alloc(sdev);
1716 }
1717 
1718 static int myrb_slave_configure(struct scsi_device *sdev)
1719 {
1720 	struct myrb_ldev_info *ldev_info;
1721 
1722 	if (sdev->channel > myrb_logical_channel(sdev->host))
1723 		return -ENXIO;
1724 
1725 	if (sdev->channel < myrb_logical_channel(sdev->host)) {
1726 		sdev->no_uld_attach = 1;
1727 		return 0;
1728 	}
1729 	if (sdev->lun != 0)
1730 		return -ENXIO;
1731 
1732 	ldev_info = sdev->hostdata;
1733 	if (!ldev_info)
1734 		return -ENXIO;
1735 	if (ldev_info->state != MYRB_DEVICE_ONLINE)
1736 		sdev_printk(KERN_INFO, sdev,
1737 			    "Logical drive is %s\n",
1738 			    myrb_devstate_name(ldev_info->state));
1739 
1740 	sdev->tagged_supported = 1;
1741 	return 0;
1742 }
1743 
1744 static void myrb_slave_destroy(struct scsi_device *sdev)
1745 {
1746 	kfree(sdev->hostdata);
1747 }
1748 
1749 static int myrb_biosparam(struct scsi_device *sdev, struct block_device *bdev,
1750 		sector_t capacity, int geom[])
1751 {
1752 	struct myrb_hba *cb = shost_priv(sdev->host);
1753 
1754 	geom[0] = cb->ldev_geom_heads;
1755 	geom[1] = cb->ldev_geom_sectors;
1756 	geom[2] = sector_div(capacity, geom[0] * geom[1]);
1757 
1758 	return 0;
1759 }
1760 
1761 static ssize_t raid_state_show(struct device *dev,
1762 		struct device_attribute *attr, char *buf)
1763 {
1764 	struct scsi_device *sdev = to_scsi_device(dev);
1765 	struct myrb_hba *cb = shost_priv(sdev->host);
1766 	int ret;
1767 
1768 	if (!sdev->hostdata)
1769 		return snprintf(buf, 16, "Unknown\n");
1770 
1771 	if (sdev->channel == myrb_logical_channel(sdev->host)) {
1772 		struct myrb_ldev_info *ldev_info = sdev->hostdata;
1773 		const char *name;
1774 
1775 		name = myrb_devstate_name(ldev_info->state);
1776 		if (name)
1777 			ret = snprintf(buf, 64, "%s\n", name);
1778 		else
1779 			ret = snprintf(buf, 64, "Invalid (%02X)\n",
1780 				       ldev_info->state);
1781 	} else {
1782 		struct myrb_pdev_state *pdev_info = sdev->hostdata;
1783 		unsigned short status;
1784 		const char *name;
1785 
1786 		status = myrb_exec_type3D(cb, MYRB_CMD_GET_DEVICE_STATE,
1787 					  sdev, pdev_info);
1788 		if (status != MYRB_STATUS_SUCCESS)
1789 			sdev_printk(KERN_INFO, sdev,
1790 				    "Failed to get device state, status %x\n",
1791 				    status);
1792 
1793 		if (!pdev_info->present)
1794 			name = "Removed";
1795 		else
1796 			name = myrb_devstate_name(pdev_info->state);
1797 		if (name)
1798 			ret = snprintf(buf, 64, "%s\n", name);
1799 		else
1800 			ret = snprintf(buf, 64, "Invalid (%02X)\n",
1801 				       pdev_info->state);
1802 	}
1803 	return ret;
1804 }
1805 
1806 static ssize_t raid_state_store(struct device *dev,
1807 		struct device_attribute *attr, const char *buf, size_t count)
1808 {
1809 	struct scsi_device *sdev = to_scsi_device(dev);
1810 	struct myrb_hba *cb = shost_priv(sdev->host);
1811 	struct myrb_pdev_state *pdev_info;
1812 	enum myrb_devstate new_state;
1813 	unsigned short status;
1814 
1815 	if (!strncmp(buf, "kill", 4) ||
1816 	    !strncmp(buf, "offline", 7))
1817 		new_state = MYRB_DEVICE_DEAD;
1818 	else if (!strncmp(buf, "online", 6))
1819 		new_state = MYRB_DEVICE_ONLINE;
1820 	else if (!strncmp(buf, "standby", 7))
1821 		new_state = MYRB_DEVICE_STANDBY;
1822 	else
1823 		return -EINVAL;
1824 
1825 	pdev_info = sdev->hostdata;
1826 	if (!pdev_info) {
1827 		sdev_printk(KERN_INFO, sdev,
1828 			    "Failed - no physical device information\n");
1829 		return -ENXIO;
1830 	}
1831 	if (!pdev_info->present) {
1832 		sdev_printk(KERN_INFO, sdev,
1833 			    "Failed - device not present\n");
1834 		return -ENXIO;
1835 	}
1836 
1837 	if (pdev_info->state == new_state)
1838 		return count;
1839 
1840 	status = myrb_set_pdev_state(cb, sdev, new_state);
1841 	switch (status) {
1842 	case MYRB_STATUS_SUCCESS:
1843 		break;
1844 	case MYRB_STATUS_START_DEVICE_FAILED:
1845 		sdev_printk(KERN_INFO, sdev,
1846 			     "Failed - Unable to Start Device\n");
1847 		count = -EAGAIN;
1848 		break;
1849 	case MYRB_STATUS_NO_DEVICE:
1850 		sdev_printk(KERN_INFO, sdev,
1851 			    "Failed - No Device at Address\n");
1852 		count = -ENODEV;
1853 		break;
1854 	case MYRB_STATUS_INVALID_CHANNEL_OR_TARGET:
1855 		sdev_printk(KERN_INFO, sdev,
1856 			 "Failed - Invalid Channel or Target or Modifier\n");
1857 		count = -EINVAL;
1858 		break;
1859 	case MYRB_STATUS_CHANNEL_BUSY:
1860 		sdev_printk(KERN_INFO, sdev,
1861 			 "Failed - Channel Busy\n");
1862 		count = -EBUSY;
1863 		break;
1864 	default:
1865 		sdev_printk(KERN_INFO, sdev,
1866 			 "Failed - Unexpected Status %04X\n", status);
1867 		count = -EIO;
1868 		break;
1869 	}
1870 	return count;
1871 }
1872 static DEVICE_ATTR_RW(raid_state);
1873 
1874 static ssize_t raid_level_show(struct device *dev,
1875 		struct device_attribute *attr, char *buf)
1876 {
1877 	struct scsi_device *sdev = to_scsi_device(dev);
1878 
1879 	if (sdev->channel == myrb_logical_channel(sdev->host)) {
1880 		struct myrb_ldev_info *ldev_info = sdev->hostdata;
1881 		const char *name;
1882 
1883 		if (!ldev_info)
1884 			return -ENXIO;
1885 
1886 		name = myrb_raidlevel_name(ldev_info->raid_level);
1887 		if (!name)
1888 			return snprintf(buf, 64, "Invalid (%02X)\n",
1889 					ldev_info->state);
1890 		return snprintf(buf, 64, "%s\n", name);
1891 	}
1892 	return snprintf(buf, 64, "Physical Drive\n");
1893 }
1894 static DEVICE_ATTR_RO(raid_level);
1895 
1896 static ssize_t rebuild_show(struct device *dev,
1897 		struct device_attribute *attr, char *buf)
1898 {
1899 	struct scsi_device *sdev = to_scsi_device(dev);
1900 	struct myrb_hba *cb = shost_priv(sdev->host);
1901 	struct myrb_rbld_progress rbld_buf;
1902 	unsigned char status;
1903 
1904 	if (sdev->channel < myrb_logical_channel(sdev->host))
1905 		return snprintf(buf, 64, "physical device - not rebuilding\n");
1906 
1907 	status = myrb_get_rbld_progress(cb, &rbld_buf);
1908 
1909 	if (rbld_buf.ldev_num != sdev->id ||
1910 	    status != MYRB_STATUS_SUCCESS)
1911 		return snprintf(buf, 64, "not rebuilding\n");
1912 
1913 	return snprintf(buf, 64, "rebuilding block %u of %u\n",
1914 			rbld_buf.ldev_size - rbld_buf.blocks_left,
1915 			rbld_buf.ldev_size);
1916 }
1917 
1918 static ssize_t rebuild_store(struct device *dev,
1919 		struct device_attribute *attr, const char *buf, size_t count)
1920 {
1921 	struct scsi_device *sdev = to_scsi_device(dev);
1922 	struct myrb_hba *cb = shost_priv(sdev->host);
1923 	struct myrb_cmdblk *cmd_blk;
1924 	union myrb_cmd_mbox *mbox;
1925 	unsigned short status;
1926 	int rc, start;
1927 	const char *msg;
1928 
1929 	rc = kstrtoint(buf, 0, &start);
1930 	if (rc)
1931 		return rc;
1932 
1933 	if (sdev->channel >= myrb_logical_channel(sdev->host))
1934 		return -ENXIO;
1935 
1936 	status = myrb_get_rbld_progress(cb, NULL);
1937 	if (start) {
1938 		if (status == MYRB_STATUS_SUCCESS) {
1939 			sdev_printk(KERN_INFO, sdev,
1940 				    "Rebuild Not Initiated; already in progress\n");
1941 			return -EALREADY;
1942 		}
1943 		mutex_lock(&cb->dcmd_mutex);
1944 		cmd_blk = &cb->dcmd_blk;
1945 		myrb_reset_cmd(cmd_blk);
1946 		mbox = &cmd_blk->mbox;
1947 		mbox->type3D.opcode = MYRB_CMD_REBUILD_ASYNC;
1948 		mbox->type3D.id = MYRB_DCMD_TAG;
1949 		mbox->type3D.channel = sdev->channel;
1950 		mbox->type3D.target = sdev->id;
1951 		status = myrb_exec_cmd(cb, cmd_blk);
1952 		mutex_unlock(&cb->dcmd_mutex);
1953 	} else {
1954 		struct pci_dev *pdev = cb->pdev;
1955 		unsigned char *rate;
1956 		dma_addr_t rate_addr;
1957 
1958 		if (status != MYRB_STATUS_SUCCESS) {
1959 			sdev_printk(KERN_INFO, sdev,
1960 				    "Rebuild Not Cancelled; not in progress\n");
1961 			return 0;
1962 		}
1963 
1964 		rate = dma_alloc_coherent(&pdev->dev, sizeof(char),
1965 					  &rate_addr, GFP_KERNEL);
1966 		if (rate == NULL) {
1967 			sdev_printk(KERN_INFO, sdev,
1968 				    "Cancellation of Rebuild Failed - Out of Memory\n");
1969 			return -ENOMEM;
1970 		}
1971 		mutex_lock(&cb->dcmd_mutex);
1972 		cmd_blk = &cb->dcmd_blk;
1973 		myrb_reset_cmd(cmd_blk);
1974 		mbox = &cmd_blk->mbox;
1975 		mbox->type3R.opcode = MYRB_CMD_REBUILD_CONTROL;
1976 		mbox->type3R.id = MYRB_DCMD_TAG;
1977 		mbox->type3R.rbld_rate = 0xFF;
1978 		mbox->type3R.addr = rate_addr;
1979 		status = myrb_exec_cmd(cb, cmd_blk);
1980 		dma_free_coherent(&pdev->dev, sizeof(char), rate, rate_addr);
1981 		mutex_unlock(&cb->dcmd_mutex);
1982 	}
1983 	if (status == MYRB_STATUS_SUCCESS) {
1984 		sdev_printk(KERN_INFO, sdev, "Rebuild %s\n",
1985 			    start ? "Initiated" : "Cancelled");
1986 		return count;
1987 	}
1988 	if (!start) {
1989 		sdev_printk(KERN_INFO, sdev,
1990 			    "Rebuild Not Cancelled, status 0x%x\n",
1991 			    status);
1992 		return -EIO;
1993 	}
1994 
1995 	switch (status) {
1996 	case MYRB_STATUS_ATTEMPT_TO_RBLD_ONLINE_DRIVE:
1997 		msg = "Attempt to Rebuild Online or Unresponsive Drive";
1998 		break;
1999 	case MYRB_STATUS_RBLD_NEW_DISK_FAILED:
2000 		msg = "New Disk Failed During Rebuild";
2001 		break;
2002 	case MYRB_STATUS_INVALID_ADDRESS:
2003 		msg = "Invalid Device Address";
2004 		break;
2005 	case MYRB_STATUS_RBLD_OR_CHECK_INPROGRESS:
2006 		msg = "Already in Progress";
2007 		break;
2008 	default:
2009 		msg = NULL;
2010 		break;
2011 	}
2012 	if (msg)
2013 		sdev_printk(KERN_INFO, sdev,
2014 			    "Rebuild Failed - %s\n", msg);
2015 	else
2016 		sdev_printk(KERN_INFO, sdev,
2017 			    "Rebuild Failed, status 0x%x\n", status);
2018 
2019 	return -EIO;
2020 }
2021 static DEVICE_ATTR_RW(rebuild);
2022 
2023 static ssize_t consistency_check_store(struct device *dev,
2024 		struct device_attribute *attr, const char *buf, size_t count)
2025 {
2026 	struct scsi_device *sdev = to_scsi_device(dev);
2027 	struct myrb_hba *cb = shost_priv(sdev->host);
2028 	struct myrb_rbld_progress rbld_buf;
2029 	struct myrb_cmdblk *cmd_blk;
2030 	union myrb_cmd_mbox *mbox;
2031 	unsigned short ldev_num = 0xFFFF;
2032 	unsigned short status;
2033 	int rc, start;
2034 	const char *msg;
2035 
2036 	rc = kstrtoint(buf, 0, &start);
2037 	if (rc)
2038 		return rc;
2039 
2040 	if (sdev->channel < myrb_logical_channel(sdev->host))
2041 		return -ENXIO;
2042 
2043 	status = myrb_get_rbld_progress(cb, &rbld_buf);
2044 	if (start) {
2045 		if (status == MYRB_STATUS_SUCCESS) {
2046 			sdev_printk(KERN_INFO, sdev,
2047 				    "Check Consistency Not Initiated; already in progress\n");
2048 			return -EALREADY;
2049 		}
2050 		mutex_lock(&cb->dcmd_mutex);
2051 		cmd_blk = &cb->dcmd_blk;
2052 		myrb_reset_cmd(cmd_blk);
2053 		mbox = &cmd_blk->mbox;
2054 		mbox->type3C.opcode = MYRB_CMD_CHECK_CONSISTENCY_ASYNC;
2055 		mbox->type3C.id = MYRB_DCMD_TAG;
2056 		mbox->type3C.ldev_num = sdev->id;
2057 		mbox->type3C.auto_restore = true;
2058 
2059 		status = myrb_exec_cmd(cb, cmd_blk);
2060 		mutex_unlock(&cb->dcmd_mutex);
2061 	} else {
2062 		struct pci_dev *pdev = cb->pdev;
2063 		unsigned char *rate;
2064 		dma_addr_t rate_addr;
2065 
2066 		if (ldev_num != sdev->id) {
2067 			sdev_printk(KERN_INFO, sdev,
2068 				    "Check Consistency Not Cancelled; not in progress\n");
2069 			return 0;
2070 		}
2071 		rate = dma_alloc_coherent(&pdev->dev, sizeof(char),
2072 					  &rate_addr, GFP_KERNEL);
2073 		if (rate == NULL) {
2074 			sdev_printk(KERN_INFO, sdev,
2075 				    "Cancellation of Check Consistency Failed - Out of Memory\n");
2076 			return -ENOMEM;
2077 		}
2078 		mutex_lock(&cb->dcmd_mutex);
2079 		cmd_blk = &cb->dcmd_blk;
2080 		myrb_reset_cmd(cmd_blk);
2081 		mbox = &cmd_blk->mbox;
2082 		mbox->type3R.opcode = MYRB_CMD_REBUILD_CONTROL;
2083 		mbox->type3R.id = MYRB_DCMD_TAG;
2084 		mbox->type3R.rbld_rate = 0xFF;
2085 		mbox->type3R.addr = rate_addr;
2086 		status = myrb_exec_cmd(cb, cmd_blk);
2087 		dma_free_coherent(&pdev->dev, sizeof(char), rate, rate_addr);
2088 		mutex_unlock(&cb->dcmd_mutex);
2089 	}
2090 	if (status == MYRB_STATUS_SUCCESS) {
2091 		sdev_printk(KERN_INFO, sdev, "Check Consistency %s\n",
2092 			    start ? "Initiated" : "Cancelled");
2093 		return count;
2094 	}
2095 	if (!start) {
2096 		sdev_printk(KERN_INFO, sdev,
2097 			    "Check Consistency Not Cancelled, status 0x%x\n",
2098 			    status);
2099 		return -EIO;
2100 	}
2101 
2102 	switch (status) {
2103 	case MYRB_STATUS_ATTEMPT_TO_RBLD_ONLINE_DRIVE:
2104 		msg = "Dependent Physical Device is DEAD";
2105 		break;
2106 	case MYRB_STATUS_RBLD_NEW_DISK_FAILED:
2107 		msg = "New Disk Failed During Rebuild";
2108 		break;
2109 	case MYRB_STATUS_INVALID_ADDRESS:
2110 		msg = "Invalid or Nonredundant Logical Drive";
2111 		break;
2112 	case MYRB_STATUS_RBLD_OR_CHECK_INPROGRESS:
2113 		msg = "Already in Progress";
2114 		break;
2115 	default:
2116 		msg = NULL;
2117 		break;
2118 	}
2119 	if (msg)
2120 		sdev_printk(KERN_INFO, sdev,
2121 			    "Check Consistency Failed - %s\n", msg);
2122 	else
2123 		sdev_printk(KERN_INFO, sdev,
2124 			    "Check Consistency Failed, status 0x%x\n", status);
2125 
2126 	return -EIO;
2127 }
2128 
2129 static ssize_t consistency_check_show(struct device *dev,
2130 		struct device_attribute *attr, char *buf)
2131 {
2132 	return rebuild_show(dev, attr, buf);
2133 }
2134 static DEVICE_ATTR_RW(consistency_check);
2135 
2136 static ssize_t ctlr_num_show(struct device *dev,
2137 		struct device_attribute *attr, char *buf)
2138 {
2139 	struct Scsi_Host *shost = class_to_shost(dev);
2140 	struct myrb_hba *cb = shost_priv(shost);
2141 
2142 	return snprintf(buf, 20, "%u\n", cb->ctlr_num);
2143 }
2144 static DEVICE_ATTR_RO(ctlr_num);
2145 
2146 static ssize_t firmware_show(struct device *dev,
2147 		struct device_attribute *attr, char *buf)
2148 {
2149 	struct Scsi_Host *shost = class_to_shost(dev);
2150 	struct myrb_hba *cb = shost_priv(shost);
2151 
2152 	return snprintf(buf, 16, "%s\n", cb->fw_version);
2153 }
2154 static DEVICE_ATTR_RO(firmware);
2155 
2156 static ssize_t model_show(struct device *dev,
2157 		struct device_attribute *attr, char *buf)
2158 {
2159 	struct Scsi_Host *shost = class_to_shost(dev);
2160 	struct myrb_hba *cb = shost_priv(shost);
2161 
2162 	return snprintf(buf, 16, "%s\n", cb->model_name);
2163 }
2164 static DEVICE_ATTR_RO(model);
2165 
2166 static ssize_t flush_cache_store(struct device *dev,
2167 		struct device_attribute *attr, const char *buf, size_t count)
2168 {
2169 	struct Scsi_Host *shost = class_to_shost(dev);
2170 	struct myrb_hba *cb = shost_priv(shost);
2171 	unsigned short status;
2172 
2173 	status = myrb_exec_type3(cb, MYRB_CMD_FLUSH, 0);
2174 	if (status == MYRB_STATUS_SUCCESS) {
2175 		shost_printk(KERN_INFO, shost,
2176 			     "Cache Flush Completed\n");
2177 		return count;
2178 	}
2179 	shost_printk(KERN_INFO, shost,
2180 		     "Cache Flush Failed, status %x\n", status);
2181 	return -EIO;
2182 }
2183 static DEVICE_ATTR_WO(flush_cache);
2184 
2185 static struct attribute *myrb_sdev_attrs[] = {
2186 	&dev_attr_rebuild.attr,
2187 	&dev_attr_consistency_check.attr,
2188 	&dev_attr_raid_state.attr,
2189 	&dev_attr_raid_level.attr,
2190 	NULL,
2191 };
2192 
2193 ATTRIBUTE_GROUPS(myrb_sdev);
2194 
2195 static struct attribute *myrb_shost_attrs[] = {
2196 	&dev_attr_ctlr_num.attr,
2197 	&dev_attr_model.attr,
2198 	&dev_attr_firmware.attr,
2199 	&dev_attr_flush_cache.attr,
2200 	NULL,
2201 };
2202 
2203 ATTRIBUTE_GROUPS(myrb_shost);
2204 
2205 static const struct scsi_host_template myrb_template = {
2206 	.module			= THIS_MODULE,
2207 	.name			= "DAC960",
2208 	.proc_name		= "myrb",
2209 	.queuecommand		= myrb_queuecommand,
2210 	.eh_host_reset_handler	= myrb_host_reset,
2211 	.slave_alloc		= myrb_slave_alloc,
2212 	.slave_configure	= myrb_slave_configure,
2213 	.slave_destroy		= myrb_slave_destroy,
2214 	.bios_param		= myrb_biosparam,
2215 	.cmd_size		= sizeof(struct myrb_cmdblk),
2216 	.shost_groups		= myrb_shost_groups,
2217 	.sdev_groups		= myrb_sdev_groups,
2218 	.this_id		= -1,
2219 };
2220 
2221 /**
2222  * myrb_is_raid - return boolean indicating device is raid volume
2223  * @dev: the device struct object
2224  */
2225 static int myrb_is_raid(struct device *dev)
2226 {
2227 	struct scsi_device *sdev = to_scsi_device(dev);
2228 
2229 	return sdev->channel == myrb_logical_channel(sdev->host);
2230 }
2231 
2232 /**
2233  * myrb_get_resync - get raid volume resync percent complete
2234  * @dev: the device struct object
2235  */
2236 static void myrb_get_resync(struct device *dev)
2237 {
2238 	struct scsi_device *sdev = to_scsi_device(dev);
2239 	struct myrb_hba *cb = shost_priv(sdev->host);
2240 	struct myrb_rbld_progress rbld_buf;
2241 	unsigned int percent_complete = 0;
2242 	unsigned short status;
2243 	unsigned int ldev_size = 0, remaining = 0;
2244 
2245 	if (sdev->channel < myrb_logical_channel(sdev->host))
2246 		return;
2247 	status = myrb_get_rbld_progress(cb, &rbld_buf);
2248 	if (status == MYRB_STATUS_SUCCESS) {
2249 		if (rbld_buf.ldev_num == sdev->id) {
2250 			ldev_size = rbld_buf.ldev_size;
2251 			remaining = rbld_buf.blocks_left;
2252 		}
2253 	}
2254 	if (remaining && ldev_size)
2255 		percent_complete = (ldev_size - remaining) * 100 / ldev_size;
2256 	raid_set_resync(myrb_raid_template, dev, percent_complete);
2257 }
2258 
2259 /**
2260  * myrb_get_state - get raid volume status
2261  * @dev: the device struct object
2262  */
2263 static void myrb_get_state(struct device *dev)
2264 {
2265 	struct scsi_device *sdev = to_scsi_device(dev);
2266 	struct myrb_hba *cb = shost_priv(sdev->host);
2267 	struct myrb_ldev_info *ldev_info = sdev->hostdata;
2268 	enum raid_state state = RAID_STATE_UNKNOWN;
2269 	unsigned short status;
2270 
2271 	if (sdev->channel < myrb_logical_channel(sdev->host) || !ldev_info)
2272 		state = RAID_STATE_UNKNOWN;
2273 	else {
2274 		status = myrb_get_rbld_progress(cb, NULL);
2275 		if (status == MYRB_STATUS_SUCCESS)
2276 			state = RAID_STATE_RESYNCING;
2277 		else {
2278 			switch (ldev_info->state) {
2279 			case MYRB_DEVICE_ONLINE:
2280 				state = RAID_STATE_ACTIVE;
2281 				break;
2282 			case MYRB_DEVICE_WO:
2283 			case MYRB_DEVICE_CRITICAL:
2284 				state = RAID_STATE_DEGRADED;
2285 				break;
2286 			default:
2287 				state = RAID_STATE_OFFLINE;
2288 			}
2289 		}
2290 	}
2291 	raid_set_state(myrb_raid_template, dev, state);
2292 }
2293 
2294 static struct raid_function_template myrb_raid_functions = {
2295 	.cookie		= &myrb_template,
2296 	.is_raid	= myrb_is_raid,
2297 	.get_resync	= myrb_get_resync,
2298 	.get_state	= myrb_get_state,
2299 };
2300 
2301 static void myrb_handle_scsi(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk,
2302 		struct scsi_cmnd *scmd)
2303 {
2304 	unsigned short status;
2305 
2306 	if (!cmd_blk)
2307 		return;
2308 
2309 	scsi_dma_unmap(scmd);
2310 
2311 	if (cmd_blk->dcdb) {
2312 		memcpy(scmd->sense_buffer, &cmd_blk->dcdb->sense, 64);
2313 		dma_pool_free(cb->dcdb_pool, cmd_blk->dcdb,
2314 			      cmd_blk->dcdb_addr);
2315 		cmd_blk->dcdb = NULL;
2316 	}
2317 	if (cmd_blk->sgl) {
2318 		dma_pool_free(cb->sg_pool, cmd_blk->sgl, cmd_blk->sgl_addr);
2319 		cmd_blk->sgl = NULL;
2320 		cmd_blk->sgl_addr = 0;
2321 	}
2322 	status = cmd_blk->status;
2323 	switch (status) {
2324 	case MYRB_STATUS_SUCCESS:
2325 	case MYRB_STATUS_DEVICE_BUSY:
2326 		scmd->result = (DID_OK << 16) | status;
2327 		break;
2328 	case MYRB_STATUS_BAD_DATA:
2329 		dev_dbg(&scmd->device->sdev_gendev,
2330 			"Bad Data Encountered\n");
2331 		if (scmd->sc_data_direction == DMA_FROM_DEVICE)
2332 			/* Unrecovered read error */
2333 			scsi_build_sense(scmd, 0, MEDIUM_ERROR, 0x11, 0);
2334 		else
2335 			/* Write error */
2336 			scsi_build_sense(scmd, 0, MEDIUM_ERROR, 0x0C, 0);
2337 		break;
2338 	case MYRB_STATUS_IRRECOVERABLE_DATA_ERROR:
2339 		scmd_printk(KERN_ERR, scmd, "Irrecoverable Data Error\n");
2340 		if (scmd->sc_data_direction == DMA_FROM_DEVICE)
2341 			/* Unrecovered read error, auto-reallocation failed */
2342 			scsi_build_sense(scmd, 0, MEDIUM_ERROR, 0x11, 0x04);
2343 		else
2344 			/* Write error, auto-reallocation failed */
2345 			scsi_build_sense(scmd, 0, MEDIUM_ERROR, 0x0C, 0x02);
2346 		break;
2347 	case MYRB_STATUS_LDRV_NONEXISTENT_OR_OFFLINE:
2348 		dev_dbg(&scmd->device->sdev_gendev,
2349 			    "Logical Drive Nonexistent or Offline");
2350 		scmd->result = (DID_BAD_TARGET << 16);
2351 		break;
2352 	case MYRB_STATUS_ACCESS_BEYOND_END_OF_LDRV:
2353 		dev_dbg(&scmd->device->sdev_gendev,
2354 			    "Attempt to Access Beyond End of Logical Drive");
2355 		/* Logical block address out of range */
2356 		scsi_build_sense(scmd, 0, NOT_READY, 0x21, 0);
2357 		break;
2358 	case MYRB_STATUS_DEVICE_NONRESPONSIVE:
2359 		dev_dbg(&scmd->device->sdev_gendev, "Device nonresponsive\n");
2360 		scmd->result = (DID_BAD_TARGET << 16);
2361 		break;
2362 	default:
2363 		scmd_printk(KERN_ERR, scmd,
2364 			    "Unexpected Error Status %04X", status);
2365 		scmd->result = (DID_ERROR << 16);
2366 		break;
2367 	}
2368 	scsi_done(scmd);
2369 }
2370 
2371 static void myrb_handle_cmdblk(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk)
2372 {
2373 	if (!cmd_blk)
2374 		return;
2375 
2376 	if (cmd_blk->completion) {
2377 		complete(cmd_blk->completion);
2378 		cmd_blk->completion = NULL;
2379 	}
2380 }
2381 
2382 static void myrb_monitor(struct work_struct *work)
2383 {
2384 	struct myrb_hba *cb = container_of(work,
2385 			struct myrb_hba, monitor_work.work);
2386 	struct Scsi_Host *shost = cb->host;
2387 	unsigned long interval = MYRB_PRIMARY_MONITOR_INTERVAL;
2388 
2389 	dev_dbg(&shost->shost_gendev, "monitor tick\n");
2390 
2391 	if (cb->new_ev_seq > cb->old_ev_seq) {
2392 		int event = cb->old_ev_seq;
2393 
2394 		dev_dbg(&shost->shost_gendev,
2395 			"get event log no %d/%d\n",
2396 			cb->new_ev_seq, event);
2397 		myrb_get_event(cb, event);
2398 		cb->old_ev_seq = event + 1;
2399 		interval = 10;
2400 	} else if (cb->need_err_info) {
2401 		cb->need_err_info = false;
2402 		dev_dbg(&shost->shost_gendev, "get error table\n");
2403 		myrb_get_errtable(cb);
2404 		interval = 10;
2405 	} else if (cb->need_rbld && cb->rbld_first) {
2406 		cb->need_rbld = false;
2407 		dev_dbg(&shost->shost_gendev,
2408 			"get rebuild progress\n");
2409 		myrb_update_rbld_progress(cb);
2410 		interval = 10;
2411 	} else if (cb->need_ldev_info) {
2412 		cb->need_ldev_info = false;
2413 		dev_dbg(&shost->shost_gendev,
2414 			"get logical drive info\n");
2415 		myrb_get_ldev_info(cb);
2416 		interval = 10;
2417 	} else if (cb->need_rbld) {
2418 		cb->need_rbld = false;
2419 		dev_dbg(&shost->shost_gendev,
2420 			"get rebuild progress\n");
2421 		myrb_update_rbld_progress(cb);
2422 		interval = 10;
2423 	} else if (cb->need_cc_status) {
2424 		cb->need_cc_status = false;
2425 		dev_dbg(&shost->shost_gendev,
2426 			"get consistency check progress\n");
2427 		myrb_get_cc_progress(cb);
2428 		interval = 10;
2429 	} else if (cb->need_bgi_status) {
2430 		cb->need_bgi_status = false;
2431 		dev_dbg(&shost->shost_gendev, "get background init status\n");
2432 		myrb_bgi_control(cb);
2433 		interval = 10;
2434 	} else {
2435 		dev_dbg(&shost->shost_gendev, "new enquiry\n");
2436 		mutex_lock(&cb->dma_mutex);
2437 		myrb_hba_enquiry(cb);
2438 		mutex_unlock(&cb->dma_mutex);
2439 		if ((cb->new_ev_seq - cb->old_ev_seq > 0) ||
2440 		    cb->need_err_info || cb->need_rbld ||
2441 		    cb->need_ldev_info || cb->need_cc_status ||
2442 		    cb->need_bgi_status) {
2443 			dev_dbg(&shost->shost_gendev,
2444 				"reschedule monitor\n");
2445 			interval = 0;
2446 		}
2447 	}
2448 	if (interval > 1)
2449 		cb->primary_monitor_time = jiffies;
2450 	queue_delayed_work(cb->work_q, &cb->monitor_work, interval);
2451 }
2452 
2453 /*
2454  * myrb_err_status - reports controller BIOS messages
2455  *
2456  * Controller BIOS messages are passed through the Error Status Register
2457  * when the driver performs the BIOS handshaking.
2458  *
2459  * Return: true for fatal errors and false otherwise.
2460  */
2461 static bool myrb_err_status(struct myrb_hba *cb, unsigned char error,
2462 		unsigned char parm0, unsigned char parm1)
2463 {
2464 	struct pci_dev *pdev = cb->pdev;
2465 
2466 	switch (error) {
2467 	case 0x00:
2468 		dev_info(&pdev->dev,
2469 			 "Physical Device %d:%d Not Responding\n",
2470 			 parm1, parm0);
2471 		break;
2472 	case 0x08:
2473 		dev_notice(&pdev->dev, "Spinning Up Drives\n");
2474 		break;
2475 	case 0x30:
2476 		dev_notice(&pdev->dev, "Configuration Checksum Error\n");
2477 		break;
2478 	case 0x60:
2479 		dev_notice(&pdev->dev, "Mirror Race Recovery Failed\n");
2480 		break;
2481 	case 0x70:
2482 		dev_notice(&pdev->dev, "Mirror Race Recovery In Progress\n");
2483 		break;
2484 	case 0x90:
2485 		dev_notice(&pdev->dev, "Physical Device %d:%d COD Mismatch\n",
2486 			   parm1, parm0);
2487 		break;
2488 	case 0xA0:
2489 		dev_notice(&pdev->dev, "Logical Drive Installation Aborted\n");
2490 		break;
2491 	case 0xB0:
2492 		dev_notice(&pdev->dev, "Mirror Race On A Critical Logical Drive\n");
2493 		break;
2494 	case 0xD0:
2495 		dev_notice(&pdev->dev, "New Controller Configuration Found\n");
2496 		break;
2497 	case 0xF0:
2498 		dev_err(&pdev->dev, "Fatal Memory Parity Error\n");
2499 		return true;
2500 	default:
2501 		dev_err(&pdev->dev, "Unknown Initialization Error %02X\n",
2502 			error);
2503 		return true;
2504 	}
2505 	return false;
2506 }
2507 
2508 /*
2509  * Hardware-specific functions
2510  */
2511 
2512 /*
2513  * DAC960 LA Series Controllers
2514  */
2515 
2516 static inline void DAC960_LA_hw_mbox_new_cmd(void __iomem *base)
2517 {
2518 	writeb(DAC960_LA_IDB_HWMBOX_NEW_CMD, base + DAC960_LA_IDB_OFFSET);
2519 }
2520 
2521 static inline void DAC960_LA_ack_hw_mbox_status(void __iomem *base)
2522 {
2523 	writeb(DAC960_LA_IDB_HWMBOX_ACK_STS, base + DAC960_LA_IDB_OFFSET);
2524 }
2525 
2526 static inline void DAC960_LA_reset_ctrl(void __iomem *base)
2527 {
2528 	writeb(DAC960_LA_IDB_CTRL_RESET, base + DAC960_LA_IDB_OFFSET);
2529 }
2530 
2531 static inline void DAC960_LA_mem_mbox_new_cmd(void __iomem *base)
2532 {
2533 	writeb(DAC960_LA_IDB_MMBOX_NEW_CMD, base + DAC960_LA_IDB_OFFSET);
2534 }
2535 
2536 static inline bool DAC960_LA_hw_mbox_is_full(void __iomem *base)
2537 {
2538 	unsigned char idb = readb(base + DAC960_LA_IDB_OFFSET);
2539 
2540 	return !(idb & DAC960_LA_IDB_HWMBOX_EMPTY);
2541 }
2542 
2543 static inline bool DAC960_LA_init_in_progress(void __iomem *base)
2544 {
2545 	unsigned char idb = readb(base + DAC960_LA_IDB_OFFSET);
2546 
2547 	return !(idb & DAC960_LA_IDB_INIT_DONE);
2548 }
2549 
2550 static inline void DAC960_LA_ack_hw_mbox_intr(void __iomem *base)
2551 {
2552 	writeb(DAC960_LA_ODB_HWMBOX_ACK_IRQ, base + DAC960_LA_ODB_OFFSET);
2553 }
2554 
2555 static inline void DAC960_LA_ack_intr(void __iomem *base)
2556 {
2557 	writeb(DAC960_LA_ODB_HWMBOX_ACK_IRQ | DAC960_LA_ODB_MMBOX_ACK_IRQ,
2558 	       base + DAC960_LA_ODB_OFFSET);
2559 }
2560 
2561 static inline bool DAC960_LA_hw_mbox_status_available(void __iomem *base)
2562 {
2563 	unsigned char odb = readb(base + DAC960_LA_ODB_OFFSET);
2564 
2565 	return odb & DAC960_LA_ODB_HWMBOX_STS_AVAIL;
2566 }
2567 
2568 static inline void DAC960_LA_enable_intr(void __iomem *base)
2569 {
2570 	unsigned char odb = 0xFF;
2571 
2572 	odb &= ~DAC960_LA_IRQMASK_DISABLE_IRQ;
2573 	writeb(odb, base + DAC960_LA_IRQMASK_OFFSET);
2574 }
2575 
2576 static inline void DAC960_LA_disable_intr(void __iomem *base)
2577 {
2578 	unsigned char odb = 0xFF;
2579 
2580 	odb |= DAC960_LA_IRQMASK_DISABLE_IRQ;
2581 	writeb(odb, base + DAC960_LA_IRQMASK_OFFSET);
2582 }
2583 
2584 static inline void DAC960_LA_write_cmd_mbox(union myrb_cmd_mbox *mem_mbox,
2585 		union myrb_cmd_mbox *mbox)
2586 {
2587 	mem_mbox->words[1] = mbox->words[1];
2588 	mem_mbox->words[2] = mbox->words[2];
2589 	mem_mbox->words[3] = mbox->words[3];
2590 	/* Memory barrier to prevent reordering */
2591 	wmb();
2592 	mem_mbox->words[0] = mbox->words[0];
2593 	/* Memory barrier to force PCI access */
2594 	mb();
2595 }
2596 
2597 static inline void DAC960_LA_write_hw_mbox(void __iomem *base,
2598 		union myrb_cmd_mbox *mbox)
2599 {
2600 	writel(mbox->words[0], base + DAC960_LA_CMDOP_OFFSET);
2601 	writel(mbox->words[1], base + DAC960_LA_MBOX4_OFFSET);
2602 	writel(mbox->words[2], base + DAC960_LA_MBOX8_OFFSET);
2603 	writeb(mbox->bytes[12], base + DAC960_LA_MBOX12_OFFSET);
2604 }
2605 
2606 static inline unsigned short DAC960_LA_read_status(void __iomem *base)
2607 {
2608 	return readw(base + DAC960_LA_STS_OFFSET);
2609 }
2610 
2611 static inline bool
2612 DAC960_LA_read_error_status(void __iomem *base, unsigned char *error,
2613 		unsigned char *param0, unsigned char *param1)
2614 {
2615 	unsigned char errsts = readb(base + DAC960_LA_ERRSTS_OFFSET);
2616 
2617 	if (!(errsts & DAC960_LA_ERRSTS_PENDING))
2618 		return false;
2619 	errsts &= ~DAC960_LA_ERRSTS_PENDING;
2620 
2621 	*error = errsts;
2622 	*param0 = readb(base + DAC960_LA_CMDOP_OFFSET);
2623 	*param1 = readb(base + DAC960_LA_CMDID_OFFSET);
2624 	writeb(0xFF, base + DAC960_LA_ERRSTS_OFFSET);
2625 	return true;
2626 }
2627 
2628 static inline unsigned short
2629 DAC960_LA_mbox_init(struct pci_dev *pdev, void __iomem *base,
2630 		union myrb_cmd_mbox *mbox)
2631 {
2632 	unsigned short status;
2633 	int timeout = 0;
2634 
2635 	while (timeout < MYRB_MAILBOX_TIMEOUT) {
2636 		if (!DAC960_LA_hw_mbox_is_full(base))
2637 			break;
2638 		udelay(10);
2639 		timeout++;
2640 	}
2641 	if (DAC960_LA_hw_mbox_is_full(base)) {
2642 		dev_err(&pdev->dev,
2643 			"Timeout waiting for empty mailbox\n");
2644 		return MYRB_STATUS_SUBSYS_TIMEOUT;
2645 	}
2646 	DAC960_LA_write_hw_mbox(base, mbox);
2647 	DAC960_LA_hw_mbox_new_cmd(base);
2648 	timeout = 0;
2649 	while (timeout < MYRB_MAILBOX_TIMEOUT) {
2650 		if (DAC960_LA_hw_mbox_status_available(base))
2651 			break;
2652 		udelay(10);
2653 		timeout++;
2654 	}
2655 	if (!DAC960_LA_hw_mbox_status_available(base)) {
2656 		dev_err(&pdev->dev, "Timeout waiting for mailbox status\n");
2657 		return MYRB_STATUS_SUBSYS_TIMEOUT;
2658 	}
2659 	status = DAC960_LA_read_status(base);
2660 	DAC960_LA_ack_hw_mbox_intr(base);
2661 	DAC960_LA_ack_hw_mbox_status(base);
2662 
2663 	return status;
2664 }
2665 
2666 static int DAC960_LA_hw_init(struct pci_dev *pdev,
2667 		struct myrb_hba *cb, void __iomem *base)
2668 {
2669 	int timeout = 0;
2670 	unsigned char error, parm0, parm1;
2671 
2672 	DAC960_LA_disable_intr(base);
2673 	DAC960_LA_ack_hw_mbox_status(base);
2674 	udelay(1000);
2675 	while (DAC960_LA_init_in_progress(base) &&
2676 	       timeout < MYRB_MAILBOX_TIMEOUT) {
2677 		if (DAC960_LA_read_error_status(base, &error,
2678 					      &parm0, &parm1) &&
2679 		    myrb_err_status(cb, error, parm0, parm1))
2680 			return -ENODEV;
2681 		udelay(10);
2682 		timeout++;
2683 	}
2684 	if (timeout == MYRB_MAILBOX_TIMEOUT) {
2685 		dev_err(&pdev->dev,
2686 			"Timeout waiting for Controller Initialisation\n");
2687 		return -ETIMEDOUT;
2688 	}
2689 	if (!myrb_enable_mmio(cb, DAC960_LA_mbox_init)) {
2690 		dev_err(&pdev->dev,
2691 			"Unable to Enable Memory Mailbox Interface\n");
2692 		DAC960_LA_reset_ctrl(base);
2693 		return -ENODEV;
2694 	}
2695 	DAC960_LA_enable_intr(base);
2696 	cb->qcmd = myrb_qcmd;
2697 	cb->write_cmd_mbox = DAC960_LA_write_cmd_mbox;
2698 	if (cb->dual_mode_interface)
2699 		cb->get_cmd_mbox = DAC960_LA_mem_mbox_new_cmd;
2700 	else
2701 		cb->get_cmd_mbox = DAC960_LA_hw_mbox_new_cmd;
2702 	cb->disable_intr = DAC960_LA_disable_intr;
2703 	cb->reset = DAC960_LA_reset_ctrl;
2704 
2705 	return 0;
2706 }
2707 
2708 static irqreturn_t DAC960_LA_intr_handler(int irq, void *arg)
2709 {
2710 	struct myrb_hba *cb = arg;
2711 	void __iomem *base = cb->io_base;
2712 	struct myrb_stat_mbox *next_stat_mbox;
2713 	unsigned long flags;
2714 
2715 	spin_lock_irqsave(&cb->queue_lock, flags);
2716 	DAC960_LA_ack_intr(base);
2717 	next_stat_mbox = cb->next_stat_mbox;
2718 	while (next_stat_mbox->valid) {
2719 		unsigned char id = next_stat_mbox->id;
2720 		struct scsi_cmnd *scmd = NULL;
2721 		struct myrb_cmdblk *cmd_blk = NULL;
2722 
2723 		if (id == MYRB_DCMD_TAG)
2724 			cmd_blk = &cb->dcmd_blk;
2725 		else if (id == MYRB_MCMD_TAG)
2726 			cmd_blk = &cb->mcmd_blk;
2727 		else {
2728 			scmd = scsi_host_find_tag(cb->host, id - 3);
2729 			if (scmd)
2730 				cmd_blk = scsi_cmd_priv(scmd);
2731 		}
2732 		if (cmd_blk)
2733 			cmd_blk->status = next_stat_mbox->status;
2734 		else
2735 			dev_err(&cb->pdev->dev,
2736 				"Unhandled command completion %d\n", id);
2737 
2738 		memset(next_stat_mbox, 0, sizeof(struct myrb_stat_mbox));
2739 		if (++next_stat_mbox > cb->last_stat_mbox)
2740 			next_stat_mbox = cb->first_stat_mbox;
2741 
2742 		if (cmd_blk) {
2743 			if (id < 3)
2744 				myrb_handle_cmdblk(cb, cmd_blk);
2745 			else
2746 				myrb_handle_scsi(cb, cmd_blk, scmd);
2747 		}
2748 	}
2749 	cb->next_stat_mbox = next_stat_mbox;
2750 	spin_unlock_irqrestore(&cb->queue_lock, flags);
2751 	return IRQ_HANDLED;
2752 }
2753 
2754 static struct myrb_privdata DAC960_LA_privdata = {
2755 	.hw_init =	DAC960_LA_hw_init,
2756 	.irq_handler =	DAC960_LA_intr_handler,
2757 	.mmio_size =	DAC960_LA_mmio_size,
2758 };
2759 
2760 /*
2761  * DAC960 PG Series Controllers
2762  */
2763 static inline void DAC960_PG_hw_mbox_new_cmd(void __iomem *base)
2764 {
2765 	writel(DAC960_PG_IDB_HWMBOX_NEW_CMD, base + DAC960_PG_IDB_OFFSET);
2766 }
2767 
2768 static inline void DAC960_PG_ack_hw_mbox_status(void __iomem *base)
2769 {
2770 	writel(DAC960_PG_IDB_HWMBOX_ACK_STS, base + DAC960_PG_IDB_OFFSET);
2771 }
2772 
2773 static inline void DAC960_PG_reset_ctrl(void __iomem *base)
2774 {
2775 	writel(DAC960_PG_IDB_CTRL_RESET, base + DAC960_PG_IDB_OFFSET);
2776 }
2777 
2778 static inline void DAC960_PG_mem_mbox_new_cmd(void __iomem *base)
2779 {
2780 	writel(DAC960_PG_IDB_MMBOX_NEW_CMD, base + DAC960_PG_IDB_OFFSET);
2781 }
2782 
2783 static inline bool DAC960_PG_hw_mbox_is_full(void __iomem *base)
2784 {
2785 	unsigned char idb = readl(base + DAC960_PG_IDB_OFFSET);
2786 
2787 	return idb & DAC960_PG_IDB_HWMBOX_FULL;
2788 }
2789 
2790 static inline bool DAC960_PG_init_in_progress(void __iomem *base)
2791 {
2792 	unsigned char idb = readl(base + DAC960_PG_IDB_OFFSET);
2793 
2794 	return idb & DAC960_PG_IDB_INIT_IN_PROGRESS;
2795 }
2796 
2797 static inline void DAC960_PG_ack_hw_mbox_intr(void __iomem *base)
2798 {
2799 	writel(DAC960_PG_ODB_HWMBOX_ACK_IRQ, base + DAC960_PG_ODB_OFFSET);
2800 }
2801 
2802 static inline void DAC960_PG_ack_intr(void __iomem *base)
2803 {
2804 	writel(DAC960_PG_ODB_HWMBOX_ACK_IRQ | DAC960_PG_ODB_MMBOX_ACK_IRQ,
2805 	       base + DAC960_PG_ODB_OFFSET);
2806 }
2807 
2808 static inline bool DAC960_PG_hw_mbox_status_available(void __iomem *base)
2809 {
2810 	unsigned char odb = readl(base + DAC960_PG_ODB_OFFSET);
2811 
2812 	return odb & DAC960_PG_ODB_HWMBOX_STS_AVAIL;
2813 }
2814 
2815 static inline void DAC960_PG_enable_intr(void __iomem *base)
2816 {
2817 	unsigned int imask = (unsigned int)-1;
2818 
2819 	imask &= ~DAC960_PG_IRQMASK_DISABLE_IRQ;
2820 	writel(imask, base + DAC960_PG_IRQMASK_OFFSET);
2821 }
2822 
2823 static inline void DAC960_PG_disable_intr(void __iomem *base)
2824 {
2825 	unsigned int imask = (unsigned int)-1;
2826 
2827 	writel(imask, base + DAC960_PG_IRQMASK_OFFSET);
2828 }
2829 
2830 static inline void DAC960_PG_write_cmd_mbox(union myrb_cmd_mbox *mem_mbox,
2831 		union myrb_cmd_mbox *mbox)
2832 {
2833 	mem_mbox->words[1] = mbox->words[1];
2834 	mem_mbox->words[2] = mbox->words[2];
2835 	mem_mbox->words[3] = mbox->words[3];
2836 	/* Memory barrier to prevent reordering */
2837 	wmb();
2838 	mem_mbox->words[0] = mbox->words[0];
2839 	/* Memory barrier to force PCI access */
2840 	mb();
2841 }
2842 
2843 static inline void DAC960_PG_write_hw_mbox(void __iomem *base,
2844 		union myrb_cmd_mbox *mbox)
2845 {
2846 	writel(mbox->words[0], base + DAC960_PG_CMDOP_OFFSET);
2847 	writel(mbox->words[1], base + DAC960_PG_MBOX4_OFFSET);
2848 	writel(mbox->words[2], base + DAC960_PG_MBOX8_OFFSET);
2849 	writeb(mbox->bytes[12], base + DAC960_PG_MBOX12_OFFSET);
2850 }
2851 
2852 static inline unsigned short
2853 DAC960_PG_read_status(void __iomem *base)
2854 {
2855 	return readw(base + DAC960_PG_STS_OFFSET);
2856 }
2857 
2858 static inline bool
2859 DAC960_PG_read_error_status(void __iomem *base, unsigned char *error,
2860 		unsigned char *param0, unsigned char *param1)
2861 {
2862 	unsigned char errsts = readb(base + DAC960_PG_ERRSTS_OFFSET);
2863 
2864 	if (!(errsts & DAC960_PG_ERRSTS_PENDING))
2865 		return false;
2866 	errsts &= ~DAC960_PG_ERRSTS_PENDING;
2867 	*error = errsts;
2868 	*param0 = readb(base + DAC960_PG_CMDOP_OFFSET);
2869 	*param1 = readb(base + DAC960_PG_CMDID_OFFSET);
2870 	writeb(0, base + DAC960_PG_ERRSTS_OFFSET);
2871 	return true;
2872 }
2873 
2874 static inline unsigned short
2875 DAC960_PG_mbox_init(struct pci_dev *pdev, void __iomem *base,
2876 		union myrb_cmd_mbox *mbox)
2877 {
2878 	unsigned short status;
2879 	int timeout = 0;
2880 
2881 	while (timeout < MYRB_MAILBOX_TIMEOUT) {
2882 		if (!DAC960_PG_hw_mbox_is_full(base))
2883 			break;
2884 		udelay(10);
2885 		timeout++;
2886 	}
2887 	if (DAC960_PG_hw_mbox_is_full(base)) {
2888 		dev_err(&pdev->dev,
2889 			"Timeout waiting for empty mailbox\n");
2890 		return MYRB_STATUS_SUBSYS_TIMEOUT;
2891 	}
2892 	DAC960_PG_write_hw_mbox(base, mbox);
2893 	DAC960_PG_hw_mbox_new_cmd(base);
2894 
2895 	timeout = 0;
2896 	while (timeout < MYRB_MAILBOX_TIMEOUT) {
2897 		if (DAC960_PG_hw_mbox_status_available(base))
2898 			break;
2899 		udelay(10);
2900 		timeout++;
2901 	}
2902 	if (!DAC960_PG_hw_mbox_status_available(base)) {
2903 		dev_err(&pdev->dev,
2904 			"Timeout waiting for mailbox status\n");
2905 		return MYRB_STATUS_SUBSYS_TIMEOUT;
2906 	}
2907 	status = DAC960_PG_read_status(base);
2908 	DAC960_PG_ack_hw_mbox_intr(base);
2909 	DAC960_PG_ack_hw_mbox_status(base);
2910 
2911 	return status;
2912 }
2913 
2914 static int DAC960_PG_hw_init(struct pci_dev *pdev,
2915 		struct myrb_hba *cb, void __iomem *base)
2916 {
2917 	int timeout = 0;
2918 	unsigned char error, parm0, parm1;
2919 
2920 	DAC960_PG_disable_intr(base);
2921 	DAC960_PG_ack_hw_mbox_status(base);
2922 	udelay(1000);
2923 	while (DAC960_PG_init_in_progress(base) &&
2924 	       timeout < MYRB_MAILBOX_TIMEOUT) {
2925 		if (DAC960_PG_read_error_status(base, &error,
2926 						&parm0, &parm1) &&
2927 		    myrb_err_status(cb, error, parm0, parm1))
2928 			return -EIO;
2929 		udelay(10);
2930 		timeout++;
2931 	}
2932 	if (timeout == MYRB_MAILBOX_TIMEOUT) {
2933 		dev_err(&pdev->dev,
2934 			"Timeout waiting for Controller Initialisation\n");
2935 		return -ETIMEDOUT;
2936 	}
2937 	if (!myrb_enable_mmio(cb, DAC960_PG_mbox_init)) {
2938 		dev_err(&pdev->dev,
2939 			"Unable to Enable Memory Mailbox Interface\n");
2940 		DAC960_PG_reset_ctrl(base);
2941 		return -ENODEV;
2942 	}
2943 	DAC960_PG_enable_intr(base);
2944 	cb->qcmd = myrb_qcmd;
2945 	cb->write_cmd_mbox = DAC960_PG_write_cmd_mbox;
2946 	if (cb->dual_mode_interface)
2947 		cb->get_cmd_mbox = DAC960_PG_mem_mbox_new_cmd;
2948 	else
2949 		cb->get_cmd_mbox = DAC960_PG_hw_mbox_new_cmd;
2950 	cb->disable_intr = DAC960_PG_disable_intr;
2951 	cb->reset = DAC960_PG_reset_ctrl;
2952 
2953 	return 0;
2954 }
2955 
2956 static irqreturn_t DAC960_PG_intr_handler(int irq, void *arg)
2957 {
2958 	struct myrb_hba *cb = arg;
2959 	void __iomem *base = cb->io_base;
2960 	struct myrb_stat_mbox *next_stat_mbox;
2961 	unsigned long flags;
2962 
2963 	spin_lock_irqsave(&cb->queue_lock, flags);
2964 	DAC960_PG_ack_intr(base);
2965 	next_stat_mbox = cb->next_stat_mbox;
2966 	while (next_stat_mbox->valid) {
2967 		unsigned char id = next_stat_mbox->id;
2968 		struct scsi_cmnd *scmd = NULL;
2969 		struct myrb_cmdblk *cmd_blk = NULL;
2970 
2971 		if (id == MYRB_DCMD_TAG)
2972 			cmd_blk = &cb->dcmd_blk;
2973 		else if (id == MYRB_MCMD_TAG)
2974 			cmd_blk = &cb->mcmd_blk;
2975 		else {
2976 			scmd = scsi_host_find_tag(cb->host, id - 3);
2977 			if (scmd)
2978 				cmd_blk = scsi_cmd_priv(scmd);
2979 		}
2980 		if (cmd_blk)
2981 			cmd_blk->status = next_stat_mbox->status;
2982 		else
2983 			dev_err(&cb->pdev->dev,
2984 				"Unhandled command completion %d\n", id);
2985 
2986 		memset(next_stat_mbox, 0, sizeof(struct myrb_stat_mbox));
2987 		if (++next_stat_mbox > cb->last_stat_mbox)
2988 			next_stat_mbox = cb->first_stat_mbox;
2989 
2990 		if (id < 3)
2991 			myrb_handle_cmdblk(cb, cmd_blk);
2992 		else
2993 			myrb_handle_scsi(cb, cmd_blk, scmd);
2994 	}
2995 	cb->next_stat_mbox = next_stat_mbox;
2996 	spin_unlock_irqrestore(&cb->queue_lock, flags);
2997 	return IRQ_HANDLED;
2998 }
2999 
3000 static struct myrb_privdata DAC960_PG_privdata = {
3001 	.hw_init =	DAC960_PG_hw_init,
3002 	.irq_handler =	DAC960_PG_intr_handler,
3003 	.mmio_size =	DAC960_PG_mmio_size,
3004 };
3005 
3006 
3007 /*
3008  * DAC960 PD Series Controllers
3009  */
3010 
3011 static inline void DAC960_PD_hw_mbox_new_cmd(void __iomem *base)
3012 {
3013 	writeb(DAC960_PD_IDB_HWMBOX_NEW_CMD, base + DAC960_PD_IDB_OFFSET);
3014 }
3015 
3016 static inline void DAC960_PD_ack_hw_mbox_status(void __iomem *base)
3017 {
3018 	writeb(DAC960_PD_IDB_HWMBOX_ACK_STS, base + DAC960_PD_IDB_OFFSET);
3019 }
3020 
3021 static inline void DAC960_PD_reset_ctrl(void __iomem *base)
3022 {
3023 	writeb(DAC960_PD_IDB_CTRL_RESET, base + DAC960_PD_IDB_OFFSET);
3024 }
3025 
3026 static inline bool DAC960_PD_hw_mbox_is_full(void __iomem *base)
3027 {
3028 	unsigned char idb = readb(base + DAC960_PD_IDB_OFFSET);
3029 
3030 	return idb & DAC960_PD_IDB_HWMBOX_FULL;
3031 }
3032 
3033 static inline bool DAC960_PD_init_in_progress(void __iomem *base)
3034 {
3035 	unsigned char idb = readb(base + DAC960_PD_IDB_OFFSET);
3036 
3037 	return idb & DAC960_PD_IDB_INIT_IN_PROGRESS;
3038 }
3039 
3040 static inline void DAC960_PD_ack_intr(void __iomem *base)
3041 {
3042 	writeb(DAC960_PD_ODB_HWMBOX_ACK_IRQ, base + DAC960_PD_ODB_OFFSET);
3043 }
3044 
3045 static inline bool DAC960_PD_hw_mbox_status_available(void __iomem *base)
3046 {
3047 	unsigned char odb = readb(base + DAC960_PD_ODB_OFFSET);
3048 
3049 	return odb & DAC960_PD_ODB_HWMBOX_STS_AVAIL;
3050 }
3051 
3052 static inline void DAC960_PD_enable_intr(void __iomem *base)
3053 {
3054 	writeb(DAC960_PD_IRQMASK_ENABLE_IRQ, base + DAC960_PD_IRQEN_OFFSET);
3055 }
3056 
3057 static inline void DAC960_PD_disable_intr(void __iomem *base)
3058 {
3059 	writeb(0, base + DAC960_PD_IRQEN_OFFSET);
3060 }
3061 
3062 static inline void DAC960_PD_write_cmd_mbox(void __iomem *base,
3063 		union myrb_cmd_mbox *mbox)
3064 {
3065 	writel(mbox->words[0], base + DAC960_PD_CMDOP_OFFSET);
3066 	writel(mbox->words[1], base + DAC960_PD_MBOX4_OFFSET);
3067 	writel(mbox->words[2], base + DAC960_PD_MBOX8_OFFSET);
3068 	writeb(mbox->bytes[12], base + DAC960_PD_MBOX12_OFFSET);
3069 }
3070 
3071 static inline unsigned char
3072 DAC960_PD_read_status_cmd_ident(void __iomem *base)
3073 {
3074 	return readb(base + DAC960_PD_STSID_OFFSET);
3075 }
3076 
3077 static inline unsigned short
3078 DAC960_PD_read_status(void __iomem *base)
3079 {
3080 	return readw(base + DAC960_PD_STS_OFFSET);
3081 }
3082 
3083 static inline bool
3084 DAC960_PD_read_error_status(void __iomem *base, unsigned char *error,
3085 		unsigned char *param0, unsigned char *param1)
3086 {
3087 	unsigned char errsts = readb(base + DAC960_PD_ERRSTS_OFFSET);
3088 
3089 	if (!(errsts & DAC960_PD_ERRSTS_PENDING))
3090 		return false;
3091 	errsts &= ~DAC960_PD_ERRSTS_PENDING;
3092 	*error = errsts;
3093 	*param0 = readb(base + DAC960_PD_CMDOP_OFFSET);
3094 	*param1 = readb(base + DAC960_PD_CMDID_OFFSET);
3095 	writeb(0, base + DAC960_PD_ERRSTS_OFFSET);
3096 	return true;
3097 }
3098 
3099 static void DAC960_PD_qcmd(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk)
3100 {
3101 	void __iomem *base = cb->io_base;
3102 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
3103 
3104 	while (DAC960_PD_hw_mbox_is_full(base))
3105 		udelay(1);
3106 	DAC960_PD_write_cmd_mbox(base, mbox);
3107 	DAC960_PD_hw_mbox_new_cmd(base);
3108 }
3109 
3110 static int DAC960_PD_hw_init(struct pci_dev *pdev,
3111 		struct myrb_hba *cb, void __iomem *base)
3112 {
3113 	int timeout = 0;
3114 	unsigned char error, parm0, parm1;
3115 
3116 	if (!request_region(cb->io_addr, 0x80, "myrb")) {
3117 		dev_err(&pdev->dev, "IO port 0x%lx busy\n",
3118 			(unsigned long)cb->io_addr);
3119 		return -EBUSY;
3120 	}
3121 	DAC960_PD_disable_intr(base);
3122 	DAC960_PD_ack_hw_mbox_status(base);
3123 	udelay(1000);
3124 	while (DAC960_PD_init_in_progress(base) &&
3125 	       timeout < MYRB_MAILBOX_TIMEOUT) {
3126 		if (DAC960_PD_read_error_status(base, &error,
3127 					      &parm0, &parm1) &&
3128 		    myrb_err_status(cb, error, parm0, parm1))
3129 			return -EIO;
3130 		udelay(10);
3131 		timeout++;
3132 	}
3133 	if (timeout == MYRB_MAILBOX_TIMEOUT) {
3134 		dev_err(&pdev->dev,
3135 			"Timeout waiting for Controller Initialisation\n");
3136 		return -ETIMEDOUT;
3137 	}
3138 	if (!myrb_enable_mmio(cb, NULL)) {
3139 		dev_err(&pdev->dev,
3140 			"Unable to Enable Memory Mailbox Interface\n");
3141 		DAC960_PD_reset_ctrl(base);
3142 		return -ENODEV;
3143 	}
3144 	DAC960_PD_enable_intr(base);
3145 	cb->qcmd = DAC960_PD_qcmd;
3146 	cb->disable_intr = DAC960_PD_disable_intr;
3147 	cb->reset = DAC960_PD_reset_ctrl;
3148 
3149 	return 0;
3150 }
3151 
3152 static irqreturn_t DAC960_PD_intr_handler(int irq, void *arg)
3153 {
3154 	struct myrb_hba *cb = arg;
3155 	void __iomem *base = cb->io_base;
3156 	unsigned long flags;
3157 
3158 	spin_lock_irqsave(&cb->queue_lock, flags);
3159 	while (DAC960_PD_hw_mbox_status_available(base)) {
3160 		unsigned char id = DAC960_PD_read_status_cmd_ident(base);
3161 		struct scsi_cmnd *scmd = NULL;
3162 		struct myrb_cmdblk *cmd_blk = NULL;
3163 
3164 		if (id == MYRB_DCMD_TAG)
3165 			cmd_blk = &cb->dcmd_blk;
3166 		else if (id == MYRB_MCMD_TAG)
3167 			cmd_blk = &cb->mcmd_blk;
3168 		else {
3169 			scmd = scsi_host_find_tag(cb->host, id - 3);
3170 			if (scmd)
3171 				cmd_blk = scsi_cmd_priv(scmd);
3172 		}
3173 		if (cmd_blk)
3174 			cmd_blk->status = DAC960_PD_read_status(base);
3175 		else
3176 			dev_err(&cb->pdev->dev,
3177 				"Unhandled command completion %d\n", id);
3178 
3179 		DAC960_PD_ack_intr(base);
3180 		DAC960_PD_ack_hw_mbox_status(base);
3181 
3182 		if (id < 3)
3183 			myrb_handle_cmdblk(cb, cmd_blk);
3184 		else
3185 			myrb_handle_scsi(cb, cmd_blk, scmd);
3186 	}
3187 	spin_unlock_irqrestore(&cb->queue_lock, flags);
3188 	return IRQ_HANDLED;
3189 }
3190 
3191 static struct myrb_privdata DAC960_PD_privdata = {
3192 	.hw_init =	DAC960_PD_hw_init,
3193 	.irq_handler =	DAC960_PD_intr_handler,
3194 	.mmio_size =	DAC960_PD_mmio_size,
3195 };
3196 
3197 
3198 /*
3199  * DAC960 P Series Controllers
3200  *
3201  * Similar to the DAC960 PD Series Controllers, but some commands have
3202  * to be translated.
3203  */
3204 
3205 static inline void myrb_translate_enquiry(void *enq)
3206 {
3207 	memcpy(enq + 132, enq + 36, 64);
3208 	memset(enq + 36, 0, 96);
3209 }
3210 
3211 static inline void myrb_translate_devstate(void *state)
3212 {
3213 	memcpy(state + 2, state + 3, 1);
3214 	memmove(state + 4, state + 5, 2);
3215 	memmove(state + 6, state + 8, 4);
3216 }
3217 
3218 static inline void myrb_translate_to_rw_command(struct myrb_cmdblk *cmd_blk)
3219 {
3220 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
3221 	int ldev_num = mbox->type5.ld.ldev_num;
3222 
3223 	mbox->bytes[3] &= 0x7;
3224 	mbox->bytes[3] |= mbox->bytes[7] << 6;
3225 	mbox->bytes[7] = ldev_num;
3226 }
3227 
3228 static inline void myrb_translate_from_rw_command(struct myrb_cmdblk *cmd_blk)
3229 {
3230 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
3231 	int ldev_num = mbox->bytes[7];
3232 
3233 	mbox->bytes[7] = mbox->bytes[3] >> 6;
3234 	mbox->bytes[3] &= 0x7;
3235 	mbox->bytes[3] |= ldev_num << 3;
3236 }
3237 
3238 static void DAC960_P_qcmd(struct myrb_hba *cb, struct myrb_cmdblk *cmd_blk)
3239 {
3240 	void __iomem *base = cb->io_base;
3241 	union myrb_cmd_mbox *mbox = &cmd_blk->mbox;
3242 
3243 	switch (mbox->common.opcode) {
3244 	case MYRB_CMD_ENQUIRY:
3245 		mbox->common.opcode = MYRB_CMD_ENQUIRY_OLD;
3246 		break;
3247 	case MYRB_CMD_GET_DEVICE_STATE:
3248 		mbox->common.opcode = MYRB_CMD_GET_DEVICE_STATE_OLD;
3249 		break;
3250 	case MYRB_CMD_READ:
3251 		mbox->common.opcode = MYRB_CMD_READ_OLD;
3252 		myrb_translate_to_rw_command(cmd_blk);
3253 		break;
3254 	case MYRB_CMD_WRITE:
3255 		mbox->common.opcode = MYRB_CMD_WRITE_OLD;
3256 		myrb_translate_to_rw_command(cmd_blk);
3257 		break;
3258 	case MYRB_CMD_READ_SG:
3259 		mbox->common.opcode = MYRB_CMD_READ_SG_OLD;
3260 		myrb_translate_to_rw_command(cmd_blk);
3261 		break;
3262 	case MYRB_CMD_WRITE_SG:
3263 		mbox->common.opcode = MYRB_CMD_WRITE_SG_OLD;
3264 		myrb_translate_to_rw_command(cmd_blk);
3265 		break;
3266 	default:
3267 		break;
3268 	}
3269 	while (DAC960_PD_hw_mbox_is_full(base))
3270 		udelay(1);
3271 	DAC960_PD_write_cmd_mbox(base, mbox);
3272 	DAC960_PD_hw_mbox_new_cmd(base);
3273 }
3274 
3275 
3276 static int DAC960_P_hw_init(struct pci_dev *pdev,
3277 		struct myrb_hba *cb, void __iomem *base)
3278 {
3279 	int timeout = 0;
3280 	unsigned char error, parm0, parm1;
3281 
3282 	if (!request_region(cb->io_addr, 0x80, "myrb")) {
3283 		dev_err(&pdev->dev, "IO port 0x%lx busy\n",
3284 			(unsigned long)cb->io_addr);
3285 		return -EBUSY;
3286 	}
3287 	DAC960_PD_disable_intr(base);
3288 	DAC960_PD_ack_hw_mbox_status(base);
3289 	udelay(1000);
3290 	while (DAC960_PD_init_in_progress(base) &&
3291 	       timeout < MYRB_MAILBOX_TIMEOUT) {
3292 		if (DAC960_PD_read_error_status(base, &error,
3293 						&parm0, &parm1) &&
3294 		    myrb_err_status(cb, error, parm0, parm1))
3295 			return -EAGAIN;
3296 		udelay(10);
3297 		timeout++;
3298 	}
3299 	if (timeout == MYRB_MAILBOX_TIMEOUT) {
3300 		dev_err(&pdev->dev,
3301 			"Timeout waiting for Controller Initialisation\n");
3302 		return -ETIMEDOUT;
3303 	}
3304 	if (!myrb_enable_mmio(cb, NULL)) {
3305 		dev_err(&pdev->dev,
3306 			"Unable to allocate DMA mapped memory\n");
3307 		DAC960_PD_reset_ctrl(base);
3308 		return -ETIMEDOUT;
3309 	}
3310 	DAC960_PD_enable_intr(base);
3311 	cb->qcmd = DAC960_P_qcmd;
3312 	cb->disable_intr = DAC960_PD_disable_intr;
3313 	cb->reset = DAC960_PD_reset_ctrl;
3314 
3315 	return 0;
3316 }
3317 
3318 static irqreturn_t DAC960_P_intr_handler(int irq, void *arg)
3319 {
3320 	struct myrb_hba *cb = arg;
3321 	void __iomem *base = cb->io_base;
3322 	unsigned long flags;
3323 
3324 	spin_lock_irqsave(&cb->queue_lock, flags);
3325 	while (DAC960_PD_hw_mbox_status_available(base)) {
3326 		unsigned char id = DAC960_PD_read_status_cmd_ident(base);
3327 		struct scsi_cmnd *scmd = NULL;
3328 		struct myrb_cmdblk *cmd_blk = NULL;
3329 		union myrb_cmd_mbox *mbox;
3330 		enum myrb_cmd_opcode op;
3331 
3332 
3333 		if (id == MYRB_DCMD_TAG)
3334 			cmd_blk = &cb->dcmd_blk;
3335 		else if (id == MYRB_MCMD_TAG)
3336 			cmd_blk = &cb->mcmd_blk;
3337 		else {
3338 			scmd = scsi_host_find_tag(cb->host, id - 3);
3339 			if (scmd)
3340 				cmd_blk = scsi_cmd_priv(scmd);
3341 		}
3342 		if (cmd_blk)
3343 			cmd_blk->status = DAC960_PD_read_status(base);
3344 		else
3345 			dev_err(&cb->pdev->dev,
3346 				"Unhandled command completion %d\n", id);
3347 
3348 		DAC960_PD_ack_intr(base);
3349 		DAC960_PD_ack_hw_mbox_status(base);
3350 
3351 		if (!cmd_blk)
3352 			continue;
3353 
3354 		mbox = &cmd_blk->mbox;
3355 		op = mbox->common.opcode;
3356 		switch (op) {
3357 		case MYRB_CMD_ENQUIRY_OLD:
3358 			mbox->common.opcode = MYRB_CMD_ENQUIRY;
3359 			myrb_translate_enquiry(cb->enquiry);
3360 			break;
3361 		case MYRB_CMD_READ_OLD:
3362 			mbox->common.opcode = MYRB_CMD_READ;
3363 			myrb_translate_from_rw_command(cmd_blk);
3364 			break;
3365 		case MYRB_CMD_WRITE_OLD:
3366 			mbox->common.opcode = MYRB_CMD_WRITE;
3367 			myrb_translate_from_rw_command(cmd_blk);
3368 			break;
3369 		case MYRB_CMD_READ_SG_OLD:
3370 			mbox->common.opcode = MYRB_CMD_READ_SG;
3371 			myrb_translate_from_rw_command(cmd_blk);
3372 			break;
3373 		case MYRB_CMD_WRITE_SG_OLD:
3374 			mbox->common.opcode = MYRB_CMD_WRITE_SG;
3375 			myrb_translate_from_rw_command(cmd_blk);
3376 			break;
3377 		default:
3378 			break;
3379 		}
3380 		if (id < 3)
3381 			myrb_handle_cmdblk(cb, cmd_blk);
3382 		else
3383 			myrb_handle_scsi(cb, cmd_blk, scmd);
3384 	}
3385 	spin_unlock_irqrestore(&cb->queue_lock, flags);
3386 	return IRQ_HANDLED;
3387 }
3388 
3389 static struct myrb_privdata DAC960_P_privdata = {
3390 	.hw_init =	DAC960_P_hw_init,
3391 	.irq_handler =	DAC960_P_intr_handler,
3392 	.mmio_size =	DAC960_PD_mmio_size,
3393 };
3394 
3395 static struct myrb_hba *myrb_detect(struct pci_dev *pdev,
3396 		const struct pci_device_id *entry)
3397 {
3398 	struct myrb_privdata *privdata =
3399 		(struct myrb_privdata *)entry->driver_data;
3400 	irq_handler_t irq_handler = privdata->irq_handler;
3401 	unsigned int mmio_size = privdata->mmio_size;
3402 	struct Scsi_Host *shost;
3403 	struct myrb_hba *cb = NULL;
3404 
3405 	shost = scsi_host_alloc(&myrb_template, sizeof(struct myrb_hba));
3406 	if (!shost) {
3407 		dev_err(&pdev->dev, "Unable to allocate Controller\n");
3408 		return NULL;
3409 	}
3410 	shost->max_cmd_len = 12;
3411 	shost->max_lun = 256;
3412 	cb = shost_priv(shost);
3413 	mutex_init(&cb->dcmd_mutex);
3414 	mutex_init(&cb->dma_mutex);
3415 	cb->pdev = pdev;
3416 	cb->host = shost;
3417 
3418 	if (pci_enable_device(pdev)) {
3419 		dev_err(&pdev->dev, "Failed to enable PCI device\n");
3420 		scsi_host_put(shost);
3421 		return NULL;
3422 	}
3423 
3424 	if (privdata->hw_init == DAC960_PD_hw_init ||
3425 	    privdata->hw_init == DAC960_P_hw_init) {
3426 		cb->io_addr = pci_resource_start(pdev, 0);
3427 		cb->pci_addr = pci_resource_start(pdev, 1);
3428 	} else
3429 		cb->pci_addr = pci_resource_start(pdev, 0);
3430 
3431 	pci_set_drvdata(pdev, cb);
3432 	spin_lock_init(&cb->queue_lock);
3433 	if (mmio_size < PAGE_SIZE)
3434 		mmio_size = PAGE_SIZE;
3435 	cb->mmio_base = ioremap(cb->pci_addr & PAGE_MASK, mmio_size);
3436 	if (cb->mmio_base == NULL) {
3437 		dev_err(&pdev->dev,
3438 			"Unable to map Controller Register Window\n");
3439 		goto failure;
3440 	}
3441 
3442 	cb->io_base = cb->mmio_base + (cb->pci_addr & ~PAGE_MASK);
3443 	if (privdata->hw_init(pdev, cb, cb->io_base))
3444 		goto failure;
3445 
3446 	if (request_irq(pdev->irq, irq_handler, IRQF_SHARED, "myrb", cb) < 0) {
3447 		dev_err(&pdev->dev,
3448 			"Unable to acquire IRQ Channel %d\n", pdev->irq);
3449 		goto failure;
3450 	}
3451 	cb->irq = pdev->irq;
3452 	return cb;
3453 
3454 failure:
3455 	dev_err(&pdev->dev,
3456 		"Failed to initialize Controller\n");
3457 	myrb_cleanup(cb);
3458 	return NULL;
3459 }
3460 
3461 static int myrb_probe(struct pci_dev *dev, const struct pci_device_id *entry)
3462 {
3463 	struct myrb_hba *cb;
3464 	int ret;
3465 
3466 	cb = myrb_detect(dev, entry);
3467 	if (!cb)
3468 		return -ENODEV;
3469 
3470 	ret = myrb_get_hba_config(cb);
3471 	if (ret < 0) {
3472 		myrb_cleanup(cb);
3473 		return ret;
3474 	}
3475 
3476 	if (!myrb_create_mempools(dev, cb)) {
3477 		ret = -ENOMEM;
3478 		goto failed;
3479 	}
3480 
3481 	ret = scsi_add_host(cb->host, &dev->dev);
3482 	if (ret) {
3483 		dev_err(&dev->dev, "scsi_add_host failed with %d\n", ret);
3484 		myrb_destroy_mempools(cb);
3485 		goto failed;
3486 	}
3487 	scsi_scan_host(cb->host);
3488 	return 0;
3489 failed:
3490 	myrb_cleanup(cb);
3491 	return ret;
3492 }
3493 
3494 
3495 static void myrb_remove(struct pci_dev *pdev)
3496 {
3497 	struct myrb_hba *cb = pci_get_drvdata(pdev);
3498 
3499 	shost_printk(KERN_NOTICE, cb->host, "Flushing Cache...");
3500 	myrb_exec_type3(cb, MYRB_CMD_FLUSH, 0);
3501 	myrb_cleanup(cb);
3502 	myrb_destroy_mempools(cb);
3503 }
3504 
3505 
3506 static const struct pci_device_id myrb_id_table[] = {
3507 	{
3508 		PCI_DEVICE_SUB(PCI_VENDOR_ID_DEC,
3509 			       PCI_DEVICE_ID_DEC_21285,
3510 			       PCI_VENDOR_ID_MYLEX,
3511 			       PCI_DEVICE_ID_MYLEX_DAC960_LA),
3512 		.driver_data	= (unsigned long) &DAC960_LA_privdata,
3513 	},
3514 	{
3515 		PCI_DEVICE_DATA(MYLEX, DAC960_PG, &DAC960_PG_privdata),
3516 	},
3517 	{
3518 		PCI_DEVICE_DATA(MYLEX, DAC960_PD, &DAC960_PD_privdata),
3519 	},
3520 	{
3521 		PCI_DEVICE_DATA(MYLEX, DAC960_P, &DAC960_P_privdata),
3522 	},
3523 	{0, },
3524 };
3525 
3526 MODULE_DEVICE_TABLE(pci, myrb_id_table);
3527 
3528 static struct pci_driver myrb_pci_driver = {
3529 	.name		= "myrb",
3530 	.id_table	= myrb_id_table,
3531 	.probe		= myrb_probe,
3532 	.remove		= myrb_remove,
3533 };
3534 
3535 static int __init myrb_init_module(void)
3536 {
3537 	int ret;
3538 
3539 	myrb_raid_template = raid_class_attach(&myrb_raid_functions);
3540 	if (!myrb_raid_template)
3541 		return -ENODEV;
3542 
3543 	ret = pci_register_driver(&myrb_pci_driver);
3544 	if (ret)
3545 		raid_class_release(myrb_raid_template);
3546 
3547 	return ret;
3548 }
3549 
3550 static void __exit myrb_cleanup_module(void)
3551 {
3552 	pci_unregister_driver(&myrb_pci_driver);
3553 	raid_class_release(myrb_raid_template);
3554 }
3555 
3556 module_init(myrb_init_module);
3557 module_exit(myrb_cleanup_module);
3558 
3559 MODULE_DESCRIPTION("Mylex DAC960/AcceleRAID/eXtremeRAID driver (Block interface)");
3560 MODULE_AUTHOR("Hannes Reinecke <hare@suse.com>");
3561 MODULE_LICENSE("GPL");
3562